$474+ Cheap flights from Heathrow (LHR) to Chicago (CHI)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Sep 20 — Sep 271
Round-trip
1 adult, Economy
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Find cheap flights from Heathrow to Chicago 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 London Heathrow to Chicago are usually found in February or January, booked 89 days in advance, depart on a Friday or Thursday and return on a Tuesday
Cheap flight deals from Heathrow to Chicago
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Cheapest flights from Heathrow to ChicagoExplore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/136:50 am -
1 stop11h 10m
Sun 9/139:35 pm -
1 stop17h 05m
Deal found 8/16![United Airlines logo]()
$636
This Justfly.com deal was found by Cheapflights users on 8/16. 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 9/166:45 pm -
1 stop23h 55m
Thu 10/16:00 pm -
1 stop22h 05m
Deal found 8/16![TAP AIR PORTUGAL logo]()
$637
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Tue 9/156:55 am -
1 stop13h 10m
Tue 9/156:15 pm -
1 stop10h 25m
Deal found 8/19![United Airlines logo]()
$638
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/276:50 am -
1 stop11h 10m
Sun 9/274:00 pm -
1 stop12h 25m
Deal found 8/17![United Airlines logo]()
$640
This deal was found by Cheapflights users on 8/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:40 am -
1 stop16h 05m
Wed 12/307:15 pm -
1 stop14h 45m
Deal found 8/19![Scandinavian Airlines logo]()
$641
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/17. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/14:35 pm -
1 stop29h 25m
Thu 10/86:00 pm -
1 stop22h 05m
Deal found 8/17![TAP AIR PORTUGAL logo]()
$642
This Mytrip deal was found by Cheapflights users on 8/19. 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.
Tue 10/277:05 am -
2 stops15h 40m
Tue 11/37:15 pm -
3 stops19h 35m
Deal found 8/19![Multiple Airlines logo]()
$643
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Thu 10/17:50 pm -
1 stop26h 10m
Sun 10/116:00 pm -
1 stop34h 20m
Deal found 8/16![TAP AIR PORTUGAL logo]()
$644
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/17. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:45 pm -
1 stop27h 15m
Sun 9/276:00 pm -
1 stop22h 55m
Deal found 8/17![TAP AIR PORTUGAL logo]()
$645
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/18. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:45 pm -
1 stop28h 55m
Sun 10/186:00 pm -
1 stop12h 45m
Deal found 8/18![TAP AIR PORTUGAL logo]()
$647
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/19. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:35 pm -
1 stop29h 25m
Sun 10/116:00 pm -
1 stop34h 20m
Deal found 8/19![TAP AIR PORTUGAL logo]()
$648
This deal was found by Cheapflights users on 8/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/79:50 am -
1 stop12h 49m
Tue 12/295:25 pm -
1 stop12h 15m
Deal found 8/18![Delta logo]()
$699
Best flights from Heathrow to ChicagoDiscover carefully curated flight deals from Heathrow to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
Discover carefully curated flight deals from Heathrow to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 8/18. 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 10/146:40 am -
1 stop15h 30m
Sun 10/258:15 pm -
1 stop14h 45m
Deal found 8/18![Scandinavian Airlines logo]()
$746
This Lufthansa deal was found by Cheapflights users on 8/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:30 am -
1 stop12h 25m
Wed 10/76:05 pm -
Nonstop8h 25m
Deal found 8/16![Multiple Airlines logo]()
$817
This Austrian Airlines deal was found by Cheapflights users on 8/16. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
1 stop13h 20m
Thu 10/84:25 pm -
Nonstop8h 20m
Deal found 8/16![Austrian Airlines logo]()
$855
This Delta deal was found by Cheapflights users on 8/19. 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 10/76:30 am -
2 stops17h 30m
Wed 10/215:31 pm -
1 stop13h 34m
Deal found 8/19![Delta logo]()
$859
This Virgin Atlantic deal was found by Cheapflights users on 8/20. 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 9/2111:45 am -
2 stops16h 59m
Mon 10/51:00 pm -
2 stops15h 20m
Deal found 8/20![Virgin Atlantic logo]()
$862
This British Airways deal was found by Cheapflights users on 8/17. 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.
Tue 10/62:45 pm -
Nonstop8h 50m
Mon 10/126:40 pm -
1 stop11h 30m
Deal found 8/17![British Airways logo]()
$873
This KLM deal was found by Cheapflights users on 8/16. 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.
Wed 9/303:15 pm -
1 stop13h 29m
Wed 10/75:31 pm -
1 stop10h 49m
Deal found 8/16![KLM logo]()
$878
This Icelandair deal was found by Cheapflights users on 8/20. 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 10/151:05 pm -
1 stop11h 10m
Mon 11/236:30 pm -
1 stop10h 20m
Deal found 8/20![Icelandair logo]()
$904
This JetBlue deal was found by Cheapflights users on 8/20. 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.
Fri 10/168:15 am -
1 stop19h 41m
Fri 11/278:55 am -
1 stop16h 00m
Deal found 8/20![JetBlue logo]()
$908
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. 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 9/186:40 am -
1 stop15h 30m
Mon 9/217:15 pm -
1 stop14h 45m
Deal found 8/16![Scandinavian Airlines logo]()
$772
This Scandinavian Airlines deal was found by Cheapflights users on 8/18. 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 10/89:05 pm -
2 stops25h 05m
Tue 10/137:15 pm -
1 stop16h 25m
Deal found 8/18![Scandinavian Airlines logo]()
$780
This Delta deal was found by Cheapflights users on 8/16. 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 10/76:30 am -
2 stops17h 30m
Wed 10/1410:59 am -
1 stop14h 16m
Deal found 8/16![Delta logo]()
$860
This British Airways deal was found by Cheapflights users on 8/17. 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 10/51:10 pm -
Nonstop8h 45m
Thu 10/159:15 pm -
Nonstop8h 00m
Deal found 8/17![British Airways logo]()
$873
This Virgin Atlantic deal was found by Cheapflights users on 8/19. 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 9/176:30 am -
2 stops18h 03m
Tue 9/292:00 pm -
1 stop17h 05m
Deal found 8/19![Virgin Atlantic logo]()
$900
This KLM deal was found by Cheapflights users on 8/20. 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.
Fri 9/1812:25 pm -
1 stop11h 54m
Mon 9/211:00 pm -
1 stop11h 25m
Deal found 8/20![KLM logo]()
$922
This Delta deal was found by Cheapflights users on 8/18. 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 10/79:20 am -
1 stop12h 54m
Thu 10/221:27 pm -
1 stop11h 43m
Deal found 8/18![Delta logo]()
$879
This Scandinavian Airlines deal was found by Cheapflights users on 8/18. 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.
Tue 12/159:05 pm -
2 stops25h 40m
Wed 12/307:15 pm -
2 stops20h 20m
Deal found 8/18![Scandinavian Airlines logo]()
$806
This Delta deal was found by Cheapflights users on 8/17. 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 12/306:30 am -
2 stops15h 52m
Wed 1/69:55 am -
1 stop15h 10m
Deal found 8/17![Delta logo]()
$927
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. 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.
Tue 10/207:05 am -
2 stops20h 38m
Tue 11/1710:35 am -
2 stops16h 45m
Deal found 8/16![Scandinavian Airlines logo]()
$897
Last-minute flights from Heathrow to ChicagoDiscover last-minute flight deals from Heathrow to Chicago. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to Chicago. Data last updated August 21, 2026 and is based on user searches.
This ChecknFly deal was found by Cheapflights users on 8/16. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/299:25 pm -
1 stop30h 00m
Mon 9/77:25 pm -
1 stop10h 30m
Deal found 8/16![Icelandair logo]()
$669
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/136:50 am -
1 stop11h 10m
Sun 9/139:35 pm -
1 stop17h 05m
Deal found 8/16![United Airlines logo]()
$636
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Tue 9/156:55 am -
1 stop13h 10m
Tue 9/156:15 pm -
1 stop10h 25m
Deal found 8/19![United Airlines logo]()
$638
This Justfly.com deal was found by Cheapflights users on 8/16. 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 9/166:45 pm -
1 stop23h 55m
Thu 10/16:00 pm -
1 stop22h 05m
Deal found 8/16![TAP AIR PORTUGAL logo]()
$637
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Wed 9/168:30 am -
2 stops13h 59m
Wed 9/168:40 pm -
1 stop30h 55m
Deal found 8/16![Air Canada logo]()
$657
This Globehunters deal was found by Cheapflights users on 8/17. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/164:40 pm -
1 stop31h 57m
Fri 9/184:25 pm -
Nonstop8h 20m
Deal found 8/17![Austrian Airlines logo]()
$673
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/17. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:45 pm -
1 stop27h 15m
Sun 9/276:00 pm -
1 stop22h 55m
Deal found 8/17![TAP AIR PORTUGAL logo]()
$645
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/19. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:35 pm -
1 stop29h 25m
Sun 10/116:00 pm -
1 stop34h 20m
Deal found 8/19![TAP AIR PORTUGAL logo]()
$648
This Mytrip deal was found by Cheapflights users on 8/20. 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.
Thu 9/172:05 pm -
2 stops30h 30m
Wed 9/3011:45 am -
2 stops14h 50m
Deal found 8/20![Multiple Airlines logo]()
$787
This Mytrip deal was found by Cheapflights users on 8/20. 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.
Sat 9/192:05 pm -
2 stops30h 30m
Sat 9/2611:45 am -
2 stops14h 50m
Deal found 8/20![Multiple Airlines logo]()
$801
This Mytrip deal was found by Cheapflights users on 8/20. 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.
Wed 9/238:50 am -
2 stops18h 35m
Tue 9/297:25 pm -
2 stops12h 30m
Deal found 8/20![Multiple Airlines logo]()
$663
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/276:50 am -
1 stop11h 10m
Sun 9/274:00 pm -
1 stop12h 25m
Deal found 8/17![United Airlines logo]()
$640
One-way flights from Heathrow to ChicagoSearch for one-way flight options from Heathrow to Chicago. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
Search for one-way flight options from Heathrow to Chicago. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Tue 9/154:50 pm -
2 stops48h 10m
Deal found 8/20![Multiple Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 8/18. 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.
Thu 11/59:05 pm -
3 stops26h 15m
Deal found 8/18![Multiple Airlines logo]()
$477
This Mytrip deal was found by Cheapflights users on 8/18. 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.
Sun 11/158:35 pm -
1 stop26h 45m
Deal found 8/18![Icelandair logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 10/196:40 am -
2 stops41h 10m
Deal found 8/18![Multiple Airlines logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/147:50 pm -
3 stops45h 10m
Deal found 8/18![Multiple Airlines logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/264:50 pm -
1 stop32h 25m
Deal found 8/20![Aer Lingus logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Thu 10/159:05 pm -
2 stops26h 45m
Deal found 8/19![Multiple Airlines logo]()
$481
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 10/106:40 am -
2 stops41h 10m
Deal found 8/20![Multiple Airlines logo]()
$482
This Kiwi.com deal was found by Cheapflights users on 8/20. 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.
Tue 10/139:05 pm -
2 stops26h 45m
Deal found 8/20![Multiple Airlines logo]()
$483
This Super.com deal was found by Cheapflights users on 8/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:15 pm -
1 stop11h 05m
Deal found 8/18![Icelandair logo]()
$484
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 12/129:55 am -
2 stops35h 35m
Deal found 8/20![Multiple Airlines logo]()
$485
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 10/171:55 pm -
2 stops33h 55m
Deal found 8/18![Multiple Airlines logo]()
$486
Find flight deals from Heathrow to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chicago (CHI). 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 August 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $636 (United Airlines) |
One-way from | $477 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $1,036 |
Good round-trip deal | $742 or less |
Good one-way deal | $692 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Heathrow to Chicago 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 August 21, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.
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Route
Depart
Return
Cheapest round-trip
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 10/14
6:40 am-4:10 pm
1 stop15h 30m
Chicago O'Hare Intl
Sun 10/25
8:15 pm-4:00 pm
1 stop14h 45m
$746
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Fri 9/18
6:40 am-4:10 pm
1 stop15h 30m
Chicago O'Hare Intl
Mon 9/21
7:15 pm-4:00 pm
1 stop14h 45m
$772
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Thu 10/8
9:05 pm-4:10 pm
2 stops25h 05m
Chicago O'Hare Intl
Tue 10/13
7:15 pm-5:40 pm
1 stop16h 25m
$780
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 12/15
9:05 pm-4:45 pm
2 stops25h 40m
Chicago O'Hare Intl
Wed 12/30
7:15 pm-9:35 pm
2 stops20h 20m
$806
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Wed 9/30
8:30 am-2:55 pm
1 stop12h 25m
Chicago O'Hare Intl
Wed 10/7
6:05 pm-8:30 am
Nonstop8h 25m
$817
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Thu 10/1
6:00 am-1:20 pm
1 stop13h 20m
Chicago O'Hare Intl
Thu 10/8
4:25 pm-6:45 am
Nonstop8h 20m
$855
LondonChicago
LHR London Heathrow - MDW Chicago Midway
LHRMDW
London Heathrow
Wed 10/7
6:30 am-6:00 pm
2 stops17h 30m
Chicago Midway
Wed 10/21
5:31 pm-1:05 pm
1 stop13h 34m
$859
LondonChicago
LHR London Heathrow - MDW Chicago Midway
LHRMDW
London Heathrow
Wed 10/7
6:30 am-6:00 pm
2 stops17h 30m
Chicago Midway
Wed 10/14
10:59 am-7:15 am
1 stop14h 16m
$860
LondonChicago
LHR London Heathrow - MDW Chicago Midway
LHRMDW
London Heathrow
Mon 9/21
11:45 am-10:44 pm
2 stops16h 59m
Chicago Midway
Mon 10/5
1:00 pm-10:20 am
2 stops15h 20m
$862
LondonChicago
LHR London Heathrow - ORD Chicago O'Hare Intl
LHRORD
London Heathrow
Tue 10/6
2:45 pm-5:35 pm
Nonstop8h 50m
Chicago O'Hare Intl
Mon 10/12
6:40 pm-12:10 pm
1 stop11h 30m
$873
Showing 1-10 of 38 resultsSorted by cheapest first
Compare providers for flights from Heathrow to Chicago
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 Heathrow to Chicago in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on London Heathrow Airport-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Chicago flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London Heathrow Airport-Chicago 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 London Heathrow Airport-Chicago 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 Heathrow to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow with our price prediction graph.
LHR-CHI
LHR-ORD
LHR-MDW
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 London Heathrow Airport to Chicago
LHR-CHI
LHR-ORD
LHR-MDW
What is the cheapest month to book a flight from London Heathrow Airport to Chicago?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of $628). Flying from London Heathrow Airport to Chicago in August is currently the most expensive (average of $1,052). 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 LHR to CHI?
Find hourly flight availability from Heathrow to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 21, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Chicago as you normally would.
Weekly flight availability from London Heathrow Airport to Chicago
Explore weekly flight availability from Heathrow to Chicago. 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 August 21, 2026.
The most flights from LHR to CHI are scheduled on a Tuesday (49 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (47 on average).
How much does it cost to fly round-trip from London Heathrow Airport to Chicago?
Airfare is below average for this route at the moment.
London Heathrow Airport to Chicago flights typically cost between $726 and $1,029 in September.The cheapest round-trip price found within the last 5 days was $636 on United Airlines (Sep 13-Sep 13).
What’s the top layover airport for flights from London Heathrow Airport to Chicago?
Share of 1-stop round-trip flights from London Heathrow Airport to Chicago chosen by Cheapflights users in the past 12 months, using the same layover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 80% of 1-stop itineraries from London Heathrow Airport to Chicago on Cheapflights.
What’s the cheapest layover airport for flights from London Heathrow Airport to Chicago?
Average round-trip fare for 1-stop flights from London Heathrow Airport to Chicago, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $610.
What’s the fastest layover option from London Heathrow Airport to Chicago?
Shortest average travel time for 1-stop one-way flights from London Heathrow Airport to Chicago, 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: 11h 09m.
Which airport typically offers the quickest layover for flights from London Heathrow Airport to Chicago?
Average layover duration for 1-stop one-way flights from London Heathrow Airport to Chicago, 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 1h 03m.
How often are flights from London to Chicago delayed?
About 10% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 181 minutes.
What is the most punctual flight time for London to Chicago flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Chicago flights?
Over the last year, United Airlines have had the lowest number of delays on this route, with just 6% of flights being delayed.
How far ahead should I book a flight from London Heathrow Airport to Chicago?
The price you pay for your flight from London Heathrow Airport to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 79 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
The best insider tips for London Heathrow Airport to Chicago 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 London Heathrow Airport to Chicago trip
Our travel experts
Reviews of airlines servicing Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated August 21, 2026.
Get a feel of what it's like to fly with Icelandair and British Airways from London Heathrow Airport to Chicago by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
6.1
Overall
6.9
Comfort
6.8
Crew
8.0
Entertainment
6.8
Boarding
7.1
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
KEF - ORD
Food
6.1
Overall
6.9
Comfort
6.8
Crew
8.0
Entertainment
6.8
Boarding
7.1
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
KEF - ORD
Food
6.1
Overall
6.9
Comfort
6.8
Crew
8.0
Entertainment
6.8
Boarding
7.1
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
KEF - ORD
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Chicago. 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 Chicago?
Book flights to Chicago if you plan to visit one of these locationsBenton Harbor
Lansing
Merrillville
Valparaiso
Hammond
Saint Joseph
Porter
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Alternative routes for Heathrow to Chicago
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Other flights to Chicago
Explore flights to Chicago departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 21, 2026.
Complete your trip
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Search flights from Heathrow to Chicago by cabin class
Find flights from Heathrow to Chicago, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Heathrow and Chicago flights
Browse other Heathrow and Chicago flight options. Last updated on August 21, 2026.
Other flights from Heathrow
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on August 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 8 airlines flying from Heathrow to Chicago
Discover the top 8 airlines that operate flights from Heathrow to Chicago. 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 August 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$421 | Average$662 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$446 | Average$806 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$530 | Average$931 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$561 | Average$875 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$562 | Average$864 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$572 | Average$1,001 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$666 | Average$696 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$703 | Average$850 | FlexibilityNo cancel fee | On-time76% |