$308+ Cheap flights from Chicago (CHI) to Heathrow (LHR)
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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LHR
Sep 19 — Sep 261
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 February or January, 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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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 August 20, 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 August 20, 2026.
This Scandinavian 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:15 pm -
2 stops42h 40m
Wed 10/146:40 am -
1 stop15h 30m
Deal found 8/19![Scandinavian Airlines logo]()
$661
This Booking.com deal was found by Cheapflights users on 8/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:15 pm -
1 stop32h 05m
Wed 11/186:40 am -
2 stops16h 05m
Deal found 8/15![Scandinavian Airlines logo]()
$670
This Scandinavian 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:15 pm -
2 stops15h 45m
Mon 10/56:40 am -
1 stop15h 30m
Deal found 8/17![Scandinavian Airlines logo]()
$671
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:15 pm -
1 stop14h 45m
Fri 10/95:00 pm -
1 stop29h 10m
Deal found 8/19![Scandinavian Airlines logo]()
$672
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/27:15 pm -
1 stop14h 45m
Fri 10/95:00 pm -
1 stop29h 10m
Deal found 8/18![Scandinavian Airlines logo]()
$673
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.
Fri 9/257:15 pm -
2 stops17h 15m
Sun 9/275:00 pm -
1 stop29h 10m
Deal found 8/18![Scandinavian Airlines logo]()
$674
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:15 pm -
1 stop14h 45m
Tue 11/36:40 am -
1 stop16h 05m
Deal found 8/18![Scandinavian Airlines logo]()
$677
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:25 pm -
1 stop10h 30m
Tue 9/291:05 pm -
1 stop11h 10m
Deal found 8/20![Icelandair logo]()
$679
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:15 pm -
1 stop17h 15m
Tue 10/277:05 am -
2 stops15h 40m
Deal found 8/18![Scandinavian Airlines logo]()
$681
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:15 pm -
2 stops15h 10m
Tue 10/136:40 am -
1 stop15h 30m
Deal found 8/18![Scandinavian Airlines logo]()
$684
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.
Tue 12/11:00 pm -
1 stop12h 50m
Wed 12/910:00 am -
2 stops18h 56m
Deal found 8/19![Virgin Atlantic logo]()
$866
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.
Tue 11/171:00 pm -
1 stop11h 25m
Thu 11/2610:00 am -
2 stops18h 56m
Deal found 8/17![Delta logo]()
$867
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 August 20, 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 August 20, 2026.
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/66:30 pm -
1 stop10h 20m
Fri 2/2612:15 pm -
1 stop11h 05m
Deal found 8/18![Icelandair logo]()
$737
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:30 am -
2 stops15h 20m
Tue 12/810:00 am -
2 stops18h 56m
Deal found 8/16![Virgin Atlantic logo]()
$872
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 2/103:00 pm -
1 stop10h 50m
Wed 2/2411:45 am -
2 stops14h 52m
Deal found 8/18![Delta logo]()
$877
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.
Sun 9/207:15 pm -
1 stop32h 05m
Fri 9/256:40 am -
1 stop15h 30m
Deal found 8/16![Scandinavian Airlines logo]()
$885
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.
Wed 10/144:25 pm -
Nonstop8h 20m
Mon 10/1912:10 pm -
1 stop30h 25m
Deal found 8/16![United Airlines logo]()
$902
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:55 pm -
Nonstop7h 45m
Wed 10/79:45 am -
Nonstop8h 45m
Deal found 8/19![Finnair logo]()
$902
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/61:00 pm -
1 stop12h 45m
Sat 2/208:55 am -
1 stop13h 30m
Deal found 8/18![KLM logo]()
$1,006
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/61:25 pm -
2 stops15h 25m
Wed 2/108:35 pm -
2 stops33h 30m
Deal found 8/17![Multiple Airlines logo]()
$1,013
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.
Tue 11/1711:28 am -
1 stop12h 57m
Tue 12/18:40 am -
2 stops15h 24m
Deal found 8/16![Delta logo]()
$897
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/69:55 am -
1 stop15h 10m
Wed 2/1012:40 pm -
1 stop15h 30m
Deal found 8/16![Virgin Atlantic logo]()
$908
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/209:30 pm -
Nonstop8h 25m
Tue 9/296:50 am -
1 stop11h 10m
Deal found 8/15![United Airlines logo]()
$926
This KLM deal was found by Cheapflights users on 8/15. 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.
Thu 10/295:09 pm -
1 stop10h 51m
Mon 11/211:20 am -
1 stop12h 40m
Deal found 8/15![Multiple Airlines logo]()
$1,015
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:27 pm -
1 stop11h 43m
Sat 10/243:15 pm -
1 stop13h 18m
Deal found 8/17![KLM logo]()
$1,015
This Delta deal was found by Cheapflights users on 8/15. 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 10/305:09 pm -
1 stop13h 31m
Tue 11/106:30 am -
2 stops17h 34m
Deal found 8/15![Delta logo]()
$936
This United Airlines deal was found by Cheapflights users on 8/15. 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 12/143:45 pm -
Nonstop8h 10m
Tue 12/297:40 am -
Nonstop9h 05m
Deal found 8/15![United Airlines logo]()
$942
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 2/1112:30 pm -
1 stop12h 35m
Tue 2/1611:20 am -
1 stop13h 17m
Deal found 8/19![Virgin Atlantic logo]()
$955
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Thu 10/294:45 pm -
Nonstop8h 10m
Thu 11/127:40 am -
Nonstop9h 05m
Deal found 8/15![United Airlines logo]()
$951
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:29 am -
2 stops15h 16m
Thu 10/89:20 am -
1 stop12h 54m
Deal found 8/17![Virgin Atlantic logo]()
$974
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.
Thu 10/151:27 pm -
1 stop11h 43m
Mon 10/196:30 am -
2 stops16h 17m
Deal found 8/17![Delta logo]()
$986
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.
Fri 11/207:05 am -
1 stop18h 05m
Fri 11/277:40 am -
Nonstop9h 05m
Deal found 8/19![United Airlines logo]()
$976
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.
Thu 9/241:55 pm -
1 stop10h 35m
Sat 10/38:00 am -
Nonstop9h 10m
Deal found 8/19![United Airlines logo]()
$1,002
Last-minute flights from Chicago to HeathrowDiscover last-minute flight deals from Chicago to Heathrow. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Heathrow. Data last updated August 20, 2026 and is based on user searches.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:45 am -
2 stops16h 15m
Sat 9/192:05 pm -
3 stops30h 30m
Deal found 8/17![Multiple Airlines logo]()
$870
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.
Wed 9/1611:45 am -
2 stops14h 50m
Sat 9/262:05 pm -
3 stops30h 30m
Deal found 8/19![Multiple Airlines logo]()
$866
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:05 pm -
1 stop12h 40m
Wed 10/77:50 pm -
1 stop22h 50m
Deal found 8/17![TAP AIR PORTUGAL logo]()
$705
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:25 pm -
1 stop10h 30m
Tue 9/291:05 pm -
1 stop11h 10m
Deal found 8/20![Icelandair logo]()
$679
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 pm -
1 stop18h 50m
Tue 9/296:45 pm -
1 stop27h 15m
Deal found 8/20![TAP AIR PORTUGAL logo]()
$684
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:00 pm -
1 stop18h 50m
Wed 9/306:45 pm -
1 stop23h 55m
Deal found 8/16![TAP AIR PORTUGAL logo]()
$686
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.
Mon 9/211:00 pm -
1 stop11h 25m
Tue 9/298:40 am -
2 stops15h 39m
Deal found 8/19![Delta logo]()
$887
This Virgin Atlantic deal was found by Cheapflights users on 8/15. 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 9/211:19 pm -
2 stops15h 01m
Tue 9/2911:45 am -
2 stops16h 59m
Deal found 8/15![Virgin Atlantic logo]()
$891
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.
Wed 9/231:19 pm -
2 stops16h 01m
Wed 9/3011:45 am -
2 stops16h 59m
Deal found 8/19![Virgin Atlantic logo]()
$890
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.
Fri 9/257:15 pm -
2 stops17h 15m
Sun 9/275:00 pm -
1 stop29h 10m
Deal found 8/18![Scandinavian Airlines logo]()
$674
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:25 pm -
1 stop18h 55m
Thu 12/1712:15 pm -
1 stop11h 05m
Deal found 8/18![Icelandair logo]()
$707
This Delta deal was found by Cheapflights users on 8/15. 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 9/301:00 pm -
1 stop12h 15m
Wed 10/76:30 am -
2 stops17h 30m
Deal found 8/15![Delta logo]()
$886
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 August 20, 2026.
Search for one-way flight options from Chicago to Heathrow. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 10/1110:25 pm -
1 stop31h 30m
Deal found 8/15![Icelandair logo]()
$308
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:25 pm -
1 stop15h 55m
Deal found 8/18![Icelandair logo]()
$309
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:25 pm -
1 stop10h 30m
Deal found 8/18![Icelandair logo]()
$310
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:25 pm -
1 stop31h 30m
Deal found 8/18![Icelandair logo]()
$312
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/308:40 pm -
Nonstop7h 45m
Deal found 8/19![British Airways logo]()
$313
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/98:40 pm -
Nonstop7h 45m
Deal found 8/19![British Airways logo]()
$314
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:40 pm -
Nonstop7h 45m
Deal found 8/17![British Airways logo]()
$315
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:40 pm -
Nonstop7h 45m
Deal found 8/19![British Airways logo]()
$316
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/55:10 pm -
Nonstop7h 45m
Deal found 8/17![Iberia logo]()
$318
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/301:22 pm -
1 stop12h 23m
Deal found 8/19![Virgin Atlantic logo]()
$322
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/911:28 am -
1 stop14h 22m
Deal found 8/17![Virgin Atlantic logo]()
$325
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 12/91:22 pm -
2 stops16h 18m
Deal found 8/17![Delta logo]()
$329
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 August 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $659 (Kiwi.com) |
One-way from | $308 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $967 |
Good round-trip deal | $990 or less |
Good one-way deal | $442 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 August 20, 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
Sat 2/6
6:30 pm-10:50 am
1 stop10h 20m
London Heathrow
Fri 2/26
12:15 pm-5:20 pm
1 stop11h 05m
$737
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Wed 12/2
9:30 am-6:50 am
2 stops15h 20m
London Heathrow
Tue 12/8
10:00 am-10:56 pm
2 stops18h 56m
$872
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 2/10
3:00 pm-7:50 am
1 stop10h 50m
London Heathrow
Wed 2/24
11:45 am-8:37 pm
2 stops14h 52m
$877
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 9/20
7:15 pm-9:20 am
1 stop32h 05m
London Heathrow
Fri 9/25
6:40 am-4:10 pm
1 stop15h 30m
$885
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Tue 11/17
11:28 am-6:25 am
1 stop12h 57m
London Heathrow
Tue 12/1
8:40 am-6:04 pm
2 stops15h 24m
$897
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 10/14
4:25 pm-6:45 am
Nonstop8h 20m
London Heathrow
Mon 10/19
12:10 pm-12:35 pm
1 stop30h 25m
$902
Quickest round-trip
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 9/29
5:55 pm-7:40 am
Nonstop7h 45m
London Heathrow
Wed 10/7
9:45 am-12:30 pm
Nonstop8h 45m
$902
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Wed 1/6
9:55 am-7:05 am
1 stop15h 10m
London Heathrow
Wed 2/10
12:40 pm-10:10 pm
1 stop15h 30m
$908
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 9/20
9:30 pm-11:55 am
Nonstop8h 25m
London Heathrow
Tue 9/29
6:50 am-12:00 pm
1 stop11h 10m
$926
ChicagoLondon
MDW Chicago Midway - LHR London Heathrow
MDWLHR
Chicago Midway
Fri 10/30
5:09 pm-11:40 am
1 stop13h 31m
London Heathrow
Tue 11/10
6:30 am-6:04 pm
2 stops17h 34m
$936
Showing 1-10 of 41 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 August.
| 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 Accuracy3 stars | Trust Score*2 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*3 stars | |
| 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 $650). Flying from Chicago to London Heathrow Airport in June is currently the most expensive (average of $1,385). 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 August 20, 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 August 20, 2026.
The most flights from CHI to LHR are scheduled on a Monday (54 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (47 on average).
How much does it cost to fly round-trip from Chicago to London Heathrow Airport?
Airfare is below average for this route at the moment.
Chicago to London Heathrow Airport flights typically cost between $769 and $1,070 in January.The cheapest round-trip price found within the last 5 days was $659 on Scandinavian Airlines (Jan 14-Jan 18).
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.
Lisbon (LIS) – chosen by Cheapflights users on 50% 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 $526.
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 25% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 170 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, British Airways have had the lowest number of delays on this route, with just 24% 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 58 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 August 20, 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.
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Entertainment
7.1
Comfort
7.3
Crew
8.1
Boarding
7.7
Food
6.7
Overall
7.4
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
Winchester
Gatwick
Hounslow
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Harrow
Southend-on-Sea
Watford
Northampton
Dartford
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 August 20, 2026.
Chicago and Heathrow flights
Browse other Chicago and Heathrow flight options. Last updated on August 20, 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 August 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$362 | Average$781 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$428 | Average$713 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$458 | Average$786 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$476 | Average$633 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$481 | Average$587 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$520 | Average$845 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$563 | Average$925 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$574 | Average$851 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$581 | Average$911 | FlexibilityNo cancel fee | On-timeN/A |