$320+ Cheap flights from Chicago (CHI) to Heathrow (LHR)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Nov 7 — Nov 141
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Heathrow with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Chicago to London Heathrow are usually found in January or February, booked 33 days in advance, depart on a Tuesday or Wednesday and return on a Friday
Cheap flight deals from Chicago to Heathrow
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Best
Last-minute
One-way
Cheapest flights from Chicago to HeathrowExplore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 8, 2026.
Explore the most affordable flight options available from Chicago to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:30 pm -
1 stop10h 20m
Mon 11/1612:15 pm -
1 stop35h 05m
Deal found 10/8![Icelandair logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
2 stops15h 15m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/8![Scandinavian Airlines logo]()
$726
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:10 pm -
2 stops59h 45m
Mon 11/910:20 am -
1 stop12h 25m
Deal found 10/6![Scandinavian Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:10 pm -
1 stop14h 50m
Fri 11/206:40 am -
1 stop16h 05m
Deal found 10/5![Scandinavian Airlines logo]()
$728
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 pm -
2 stops15h 10m
Mon 10/191:55 pm -
2 stops32h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$729
This Mytrip deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
3 stops20h 10m
Thu 11/127:05 am -
2 stops15h 40m
Deal found 10/7![Scandinavian Airlines logo]()
$730
This Scandinavian Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:10 pm -
2 stops15h 15m
Sun 11/86:40 am -
2 stops20h 51m
Deal found 10/6![Scandinavian Airlines logo]()
$731
This oojo deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:10 pm -
1 stop14h 50m
Fri 10/307:30 pm -
1 stop27h 15m
Deal found 10/7![Scandinavian Airlines logo]()
$732
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:10 pm -
1 stop20h 30m
Wed 11/257:30 pm -
1 stop27h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$733
This FlightHub deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:10 pm -
2 stops32h 25m
Mon 11/167:30 pm -
1 stop27h 15m
Deal found 10/7![Scandinavian Airlines logo]()
$734
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:10 pm -
2 stops20h 25m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/6![Scandinavian Airlines logo]()
$735
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:10 pm -
1 stop17h 20m
Mon 12/76:40 am -
1 stop16h 05m
Deal found 10/5![Scandinavian Airlines logo]()
$736
Best flights from Chicago to HeathrowDiscover carefully curated flight deals from Chicago to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
Discover carefully curated flight deals from Chicago to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 8, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/87:10 pm -
2 stops20h 25m
Wed 2/247:50 pm -
2 stops26h 55m
Deal found 10/4![Scandinavian Airlines logo]()
$755
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/59:30 pm -
Nonstop8h 25m
Tue 4/206:50 am -
1 stop11h 10m
Deal found 10/5![United Airlines logo]()
$864
This Finnair deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/58:05 pm -
Nonstop7h 55m
Tue 6/810:20 am -
1 stop13h 30m
Deal found 10/4![Finnair logo]()
$894
This Delta deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:27 pm -
1 stop12h 18m
Wed 11/116:30 am -
2 stops16h 09m
Deal found 10/5![Delta logo]()
$911
This Virgin Atlantic deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/29:29 am -
2 stops15h 21m
Tue 11/106:30 am -
2 stops15h 48m
Deal found 10/5![Virgin Atlantic logo]()
$916
This British Airways deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1710:50 pm -
Nonstop7h 45m
Mon 3/2211:00 am -
Nonstop8h 45m
Deal found 10/5![British Airways logo]()
$942
This Icelandair deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:15 pm -
3 stops15h 35m
Tue 11/1712:15 pm -
2 stops15h 15m
Deal found 10/3![Multiple Airlines logo]()
$1,029
This KLM deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:41 pm -
1 stop12h 04m
Mon 12/711:20 am -
1 stop12h 41m
Deal found 10/4![KLM logo]()
$1,060
This Scandinavian Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:25 am -
2 stops19h 55m
Mon 10/269:05 pm -
2 stops25h 40m
Deal found 10/5![Scandinavian Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/289:30 pm -
Nonstop8h 25m
Thu 4/111:05 am -
Nonstop9h 05m
Deal found 10/6![United Airlines logo]()
$897
This British Airways deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1510:50 pm -
Nonstop7h 45m
Sun 3/2811:10 am -
Nonstop8h 40m
Deal found 10/5![British Airways logo]()
$957
This Virgin Atlantic deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1011:27 am -
2 stops13h 48m
Sun 11/156:20 am -
2 stops17h 44m
Deal found 10/7![Virgin Atlantic logo]()
$973
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/911:28 am -
1 stop12h 57m
Sun 12/136:30 am -
2 stops17h 31m
Deal found 10/4![Delta logo]()
$987
This Scandinavian Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/258:10 pm -
1 stop16h 30m
Sat 4/36:40 am -
2 stops32h 53m
Deal found 10/6![Scandinavian Airlines logo]()
$926
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:00 pm -
1 stop18h 20m
Wed 11/257:40 am -
Nonstop9h 05m
Deal found 10/6![United Airlines logo]()
$931
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:30 pm -
1 stop12h 35m
Tue 11/178:40 am -
2 stops15h 24m
Deal found 10/3![Delta logo]()
$987
This Virgin Atlantic deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/21:41 pm -
1 stop12h 04m
Sun 12/139:50 am -
1 stop13h 00m
Deal found 10/6![Virgin Atlantic logo]()
$991
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/235:45 pm -
Nonstop8h 10m
Mon 11/3012:05 pm -
1 stop34h 10m
Deal found 10/6![United Airlines logo]()
$939
This Virgin Atlantic deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/65:12 pm -
1 stop12h 28m
Mon 12/1411:20 am -
1 stop12h 41m
Deal found 10/6![Virgin Atlantic logo]()
$991
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2612:49 pm -
1 stop12h 36m
Mon 11/96:30 am -
2 stops17h 34m
Deal found 10/4![Delta logo]()
$1,011
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/284:25 pm -
Nonstop8h 20m
Sun 4/42:05 pm -
1 stop11h 48m
Deal found 10/7![United Airlines logo]()
$949
This Icelandair deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/101:15 pm -
3 stops15h 35m
Sun 12/1312:15 pm -
2 stops17h 40m
Deal found 10/4![Multiple Airlines logo]()
$1,334
This Virgin Atlantic deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:29 am -
2 stops16h 21m
Mon 11/26:30 am -
2 stops17h 30m
Deal found 10/5![Virgin Atlantic logo]()
$1,306
Last-minute flights from Chicago to HeathrowDiscover last-minute flight deals from Chicago to Heathrow. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Heathrow. Data last updated October 8, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 pm -
2 stops15h 10m
Mon 10/191:55 pm -
2 stops32h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$729
This oojo deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/268:10 pm -
1 stop14h 50m
Fri 10/307:30 pm -
1 stop27h 15m
Deal found 10/7![Scandinavian Airlines logo]()
$732
This Mytrip deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
3 stops20h 10m
Thu 11/127:05 am -
2 stops15h 40m
Deal found 10/7![Scandinavian Airlines logo]()
$730
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:10 pm -
2 stops59h 45m
Mon 11/910:20 am -
1 stop12h 25m
Deal found 10/6![Scandinavian Airlines logo]()
$727
This Scandinavian Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:10 pm -
2 stops15h 15m
Sun 11/86:40 am -
2 stops20h 51m
Deal found 10/6![Scandinavian Airlines logo]()
$731
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
2 stops15h 15m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/8![Scandinavian Airlines logo]()
$726
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:30 pm -
1 stop10h 20m
Mon 11/1612:15 pm -
1 stop35h 05m
Deal found 10/8![Icelandair logo]()
$725
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:10 pm -
2 stops20h 25m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/6![Scandinavian Airlines logo]()
$735
This FlightHub deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:10 pm -
2 stops32h 25m
Mon 11/237:30 pm -
1 stop27h 15m
Deal found 10/7![Scandinavian Airlines logo]()
$734
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:10 pm -
1 stop14h 50m
Fri 11/206:40 am -
1 stop16h 05m
Deal found 10/5![Scandinavian Airlines logo]()
$728
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:10 pm -
1 stop20h 30m
Wed 11/257:30 pm -
1 stop27h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$733
This Cheapflightsfares deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/227:10 pm -
1 stop20h 30m
Thu 11/266:40 am -
1 stop16h 05m
Deal found 10/4![Scandinavian Airlines logo]()
$736
One-way flights from Chicago to HeathrowSearch for one-way flight options from Chicago to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
Search for one-way flight options from Chicago to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:30 pm -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Icelandair logo]()
$320
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/237:50 pm -
1 stop18h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![SWISS logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/49:00 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Aer Lingus logo]()
$322
This Flightnetwork deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/38:05 pm -
1 stop14h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Aer Lingus logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/53:45 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Aer Lingus logo]()
$324
This Justfly.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/610:35 am -
1 stop19h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![KLM logo]()
$324
This United Airlines deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/46:40 pm -
Nonstop8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/117:05 am -
1 stop19h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/41:00 pm -
1 stop11h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Delta logo]()
$326
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/512:15 pm -
2 stops15h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/61:00 pm -
2 stops15h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Delta logo]()
$329
This JetBlue deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/261:00 pm -
1 stop12h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![JetBlue logo]()
$330
Find flight deals from Chicago to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $724 (Justfly.com) |
One-way from | $320 (oojo) |
Popular in | June |
Cheapest in | January |
Average price | $781 |
Good round-trip deal | $781 or less |
Good one-way deal | $445 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 8, 2026.
Use the filters below to find and compare flights from Chicago to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 4/4
6:40 pm-9:00 am
Nonstop8h 20m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 1/6
3:45 pm-5:55 am
Nonstop8h 10m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 4/6
6:40 pm-9:00 am
Nonstop8h 20m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
Quickest round-trip
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 1/5
9:50 pm-11:35 am
Nonstop7h 45m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$326
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Fri 4/2
5:00 pm-6:50 am
Nonstop7h 50m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$375
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Thu 1/7
9:50 pm-11:35 am
Nonstop7h 45m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$375
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Thu 11/19
11:00 am-6:55 am
1 stop13h 55m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$490
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Tue 12/29
9:30 am-7:45 am
1 stop16h 15m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$558
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Wed 12/9
12:39 pm-7:05 am
1 stop12h 26m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$558
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Sun 11/8
9:29 am-6:20 am
2 stops14h 51m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$558
Showing 1-10 of 45 resultsSorted by cheapest first
Compare providers for flights from Chicago to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Heathrow in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Chicago-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Chicago to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Chicago with our price prediction graph.
CHI-LHR
ORD-LHR
MDW-LHR
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago to London Heathrow Airport
CHI-LHR
ORD-LHR
MDW-LHR
What is the cheapest month to book a flight from Chicago to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Chicago to London Heathrow Airport (average of $624). Flying from Chicago to London Heathrow Airport in June is currently the most expensive (average of $1,383). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from CHI to LHR?
Find hourly flight availability from Chicago to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 8, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago to London Heathrow Airport as you normally would.
Weekly flight availability from Chicago to London Heathrow Airport
Explore weekly flight availability from Chicago to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated October 8, 2026.
The most flights from CHI to LHR are scheduled on a Tuesday (56 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).
How much does it cost to fly round-trip from Chicago to London Heathrow Airport?
Airfare is typical for this route at the moment.
Chicago to London Heathrow Airport flights typically cost between $709 and $879 in January.The cheapest round-trip price found within the last 5 days was $724 on TAP AIR PORTUGAL (Jan 22-Jan 31).
What’s the top layover airport for flights from Chicago to London Heathrow Airport?
Share of 1-stop round-trip flights from Chicago to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 64% of 1-stop itineraries from Chicago to London Heathrow Airport on Cheapflights.
What’s the cheapest layover airport for flights from Chicago to London Heathrow Airport?
Average round-trip fare for 1-stop flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $501.
What’s the fastest layover option from Chicago to London Heathrow Airport?
Shortest average travel time for 1-stop one-way flights from Chicago to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 10h 20m.
Which airport typically offers the quickest layover for flights from Chicago to London Heathrow Airport?
Average layover duration for 1-stop one-way flights from Chicago to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 0h 55m.
How often are flights from Chicago to London delayed?
About 23% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 161 minutes.
What is the most punctual flight time for Chicago to London flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Chicago to London flights?
Over the last year, American Airlines have had the lowest number of delays on this route, with just 22% of flights being delayed.
How far ahead should I book a flight from Chicago to London Heathrow Airport?
To ensure you get the cheapest price possible for a flight from Chicago to London Heathrow Airport, you should look to book at least 65 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
The best insider tips for Chicago to London Heathrow Airport flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to London Heathrow Airport trip
Our travel experts
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated October 8, 2026.
Peruse reviews from past customers who have flown with United Airlines,Aer Lingus, andAmerican Airlines from Chicago to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Related info for your journey
Find useful and relevant information for your journey from Chicago to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Dorking
Gatwick
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Wembley
Harrow
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Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
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Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 8, 2026.
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Top 10 airlines flying from Chicago to Heathrow
Discover the top 10 airlines that operate flights from Chicago to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$39 | Average$786 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$286 | Average$1,411 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$362 | Average$920 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$432 | Average$728 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$698 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$482 | Average$632 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$549 | Average$925 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$599 | Average$919 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$606 | Average$929 | FlexibilityNo cancel fee | On-timeN/A |