$230+ Cheap flights from Illinois to London (LON)
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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Sep 15 — Sep 221
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to London with Cheapflights
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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
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Cheapest flights from Illinois to LondonExplore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2026.
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Fri 10/238:34 pm -
1 stop31h 26m
Tue 11/310:10 am -
2 stops53h 30m
Deal found 8/11![Multiple Airlines logo]()
$610
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Fri 9/255:19 pm -
1 stop34h 41m
Wed 9/302:00 pm -
1 stop33h 54m
Deal found 8/11![Multiple Airlines logo]()
$660
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/2811:15 am -
1 stop16h 45m
Wed 11/1810:10 am -
1 stop19h 40m
Deal found 8/12![Multiple Airlines logo]()
$665
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 10/177:44 pm -
2 stops32h 16m
Thu 10/2911:00 am -
1 stop26h 21m
Deal found 8/12![Multiple Airlines logo]()
$666
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Wed 10/217:44 pm -
2 stops32h 16m
Thu 10/2911:00 am -
1 stop26h 21m
Deal found 8/12![Multiple Airlines logo]()
$667
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:30 pm -
2 stops22h 45m
Fri 11/205:55 am -
2 stops17h 25m
Deal found 8/15![Multiple Airlines logo]()
$667
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Fri 9/257:15 pm -
2 stops17h 15m
Sun 9/275:00 pm -
1 stop29h 10m
Deal found 8/13![Scandinavian Airlines logo]()
$668
This Mytrip deal was found by Cheapflights users on 8/13. 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 10/247:30 pm -
2 stops22h 15m
Wed 10/286:10 am -
1 stop18h 15m
Deal found 8/13![Multiple Airlines logo]()
$668
This Mytrip deal was found by Cheapflights users on 8/14. 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 11/16:30 pm -
1 stop14h 40m
Mon 11/97:40 am -
1 stop15h 40m
Deal found 8/14![Multiple Airlines logo]()
$669
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/283:45 pm -
1 stop15h 05m
Mon 10/58:25 am -
2 stops39h 25m
Deal found 8/13![Multiple Airlines logo]()
$669
This Mytrip deal was found by Cheapflights users on 8/14. 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 10/67:25 pm -
2 stops20h 45m
Tue 10/139:40 am -
2 stops14h 35m
Deal found 8/14![Multiple Airlines logo]()
$670
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
Best flights from Illinois to LondonDiscover carefully curated flight deals from Illinois to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 16, 2026.
Discover carefully curated flight deals from Illinois to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Fri 10/238:34 pm -
1 stop31h 26m
Tue 11/310:10 am -
2 stops53h 30m
Deal found 8/11![Multiple Airlines logo]()
$610
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:30 pm -
1 stop10h 20m
Wed 11/1812:15 pm -
1 stop11h 05m
Deal found 8/15![Icelandair logo]()
$736
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/11. 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 10/288:00 pm -
2 stops33h 00m
Tue 11/34:35 pm -
1 stop28h 55m
Deal found 8/11![TAP AIR PORTUGAL logo]()
$788
This Scandinavian Airlines deal was found by Cheapflights users on 8/13. 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 9/297:15 pm -
2 stops18h 40m
Fri 10/237:05 am -
2 stops15h 05m
Deal found 8/13![Scandinavian Airlines logo]()
$822
This Turkish 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:10 pm -
1 stop38h 30m
Tue 10/65:35 pm -
1 stop22h 05m
Deal found 8/15![Turkish Airlines logo]()
$835
This ITA Airways 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/113:00 pm -
1 stop18h 40m
Tue 10/134:30 pm -
1 stop26h 40m
Deal found 8/15![ITA Airways logo]()
$843
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 11/105:09 pm -
1 stop12h 31m
Tue 11/176:30 am -
2 stops16h 09m
Deal found 8/16![Delta logo]()
$886
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.
Wed 10/74:50 pm -
1 stop10h 00m
Tue 10/139:20 am -
1 stop10h 55m
Deal found 8/15![KLM logo]()
$901
This Finnair deal was found by Cheapflights users on 8/12. 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.
Fri 10/238:50 pm -
Nonstop8h 00m
Tue 10/2710:20 am -
1 stop13h 30m
Deal found 8/12![Finnair logo]()
$923
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 9/134:25 pm -
Nonstop8h 20m
Wed 9/236:50 am -
1 stop11h 10m
Deal found 8/15![United Airlines logo]()
$926
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 11/29:29 am -
2 stops15h 21m
Mon 11/98:55 am -
2 stops20h 01m
Deal found 8/15![Virgin Atlantic logo]()
$948
This Expedia deal was found by Cheapflights users on 8/11. 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 10/2311:31 am -
2 stops17h 19m
Tue 11/311:45 am -
2 stops27h 31m
Deal found 8/11![Iberia logo]()
$966
This SWISS deal was found by Cheapflights users on 8/13. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:40 pm -
2 stops15h 10m
Tue 11/107:05 pm -
1 stop23h 35m
Deal found 8/13![SWISS logo]()
$1,154
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Fri 11/66:30 pm -
2 stops20h 35m
Fri 11/139:45 pm -
2 stops25h 35m
Deal found 8/14![Multiple Airlines logo]()
$694
This Mytrip deal was found by Cheapflights users on 8/12. 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 10/57:25 pm -
2 stops21h 25m
Tue 10/139:40 am -
2 stops14h 35m
Deal found 8/12![Multiple Airlines logo]()
$740
This Turkish Airlines deal was found by Cheapflights users on 8/11. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:45 am -
1 stop22h 35m
Tue 11/175:20 pm -
1 stop22h 40m
Deal found 8/11![Turkish Airlines logo]()
$835
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.
Tue 1/197:20 am -
2 stops26h 25m
Tue 1/2610:00 am -
2 stops28h 12m
Deal found 8/15![Delta logo]()
$887
This Mytrip deal was found by Cheapflights users on 8/13. 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 10/277:30 pm -
2 stops21h 40m
Tue 11/107:45 am -
2 stops15h 35m
Deal found 8/13![Multiple Airlines logo]()
$742
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:25 pm -
1 stop31h 30m
Mon 9/79:25 pm -
1 stop30h 00m
Deal found 8/16![Icelandair logo]()
$915
This United Airlines deal was found by Cheapflights users on 8/14. 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 8/14![United Airlines logo]()
$927
This KLM deal was found by Cheapflights users on 8/12. 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.
Sun 10/255:25 pm -
1 stop10h 25m
Sat 11/78:40 am -
1 stop11h 45m
Deal found 8/12![KLM logo]()
$951
This Virgin Atlantic deal was found by Cheapflights users on 8/12. 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 10/224:15 pm -
1 stop11h 15m
Tue 10/275:50 pm -
1 stop26h 35m
Deal found 8/12![Virgin Atlantic logo]()
$951
This Turkish 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:45 am -
1 stop16h 10m
Tue 12/15:20 pm -
1 stop22h 40m
Deal found 8/16![Turkish Airlines logo]()
$865
This Delta deal was found by Cheapflights users on 8/13. 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 10/2712:27 pm -
2 stops15h 33m
Tue 11/1010:00 am -
2 stops18h 56m
Deal found 8/13![Delta logo]()
$897
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/12. 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.
Tue 9/299:38 am -
2 stops18h 07m
Wed 10/74:25 pm -
1 stop26h 15m
Deal found 8/12![TAP AIR PORTUGAL logo]()
$989
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 12/106:30 pm -
1 stop12h 30m
Tue 12/157:00 am -
1 stop16h 20m
Deal found 8/14![Multiple Airlines logo]()
$751
This Finnair deal was found by Cheapflights users on 8/14. 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.
Fri 10/96:05 pm -
Nonstop8h 00m
Sat 10/179:45 am -
Nonstop8h 45m
Deal found 8/14![Finnair logo]()
$1,001
This Scandinavian Airlines deal was found by Cheapflights users on 8/12. 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 9/117:35 am -
2 stops19h 45m
Mon 9/149:05 pm -
2 stops25h 05m
Deal found 8/12![Scandinavian Airlines logo]()
$1,023
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.
Wed 10/74:50 pm -
1 stop10h 00m
Mon 10/129:20 am -
1 stop11h 10m
Deal found 8/15![KLM logo]()
$951
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/236:00 am -
1 stop23h 55m
Wed 9/305:40 pm -
1 stop32h 20m
Deal found 8/12![United Airlines logo]()
$952
Last-minute flights from Illinois to LondonDiscover last-minute flight deals from Illinois to London. Data last updated August 16, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to London. Data last updated August 16, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/13. 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 9/87:25 pm -
2 stops22h 45m
Tue 9/1512:45 pm -
2 stops35h 30m
Deal found 8/13![Multiple Airlines logo]()
$681
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:25 pm -
2 stops22h 45m
Tue 9/227:10 am -
2 stops17h 05m
Deal found 8/15![Multiple Airlines logo]()
$682
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/213:45 pm -
1 stop23h 10m
Tue 9/298:00 pm -
2 stops29h 15m
Deal found 8/13![Multiple Airlines logo]()
$670
This Mytrip deal was found by Cheapflights users on 8/14. 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 9/227:25 pm -
2 stops20h 45m
Wed 9/306:15 am -
2 stops21h 10m
Deal found 8/14![Multiple Airlines logo]()
$675
This Mytrip deal was found by Cheapflights users on 8/14. 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 9/227:25 pm -
2 stops20h 55m
Wed 9/306:30 am -
2 stops20h 55m
Deal found 8/14![Multiple Airlines logo]()
$675
This Kiwi.com deal was found by Cheapflights users on 8/11. 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.
Fri 9/255:19 pm -
1 stop34h 41m
Wed 9/302:00 pm -
1 stop33h 54m
Deal found 8/11![Multiple Airlines logo]()
$660
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Fri 9/257:15 pm -
2 stops17h 15m
Sun 9/275:00 pm -
1 stop29h 10m
Deal found 8/13![Scandinavian Airlines logo]()
$668
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/2811:15 am -
1 stop16h 45m
Wed 11/1810:10 am -
1 stop19h 40m
Deal found 8/12![Multiple Airlines logo]()
$665
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/283:45 pm -
1 stop15h 05m
Mon 10/58:25 am -
2 stops39h 25m
Deal found 8/13![Multiple Airlines logo]()
$669
This Expedia deal was found by Cheapflights users on 8/13. 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 9/289:38 am -
1 stop14h 52m
Tue 10/67:40 am -
1 stop12h 20m
Deal found 8/13![Multiple Airlines logo]()
$673
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/2811:15 am -
1 stop16h 45m
Tue 11/1710:10 am -
1 stop19h 40m
Deal found 8/12![Multiple Airlines logo]()
$686
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:25 pm -
2 stops17h 00m
Tue 10/65:50 pm -
2 stops33h 35m
Deal found 8/15![Multiple Airlines logo]()
$680
One-way flights from Illinois to LondonSearch for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated August 16, 2026.
Search for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated August 16, 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.
Mon 10/196:35 pm -
2 stops33h 25m
Deal found 8/15![Multiple Airlines logo]()
$230
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.
Wed 10/216:35 pm -
2 stops33h 25m
Deal found 8/15![Multiple Airlines logo]()
$268
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.
Fri 10/236:35 pm -
2 stops33h 25m
Deal found 8/15![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 8/14![Icelandair logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/103:50 pm -
2 stops32h 30m
Deal found 8/11![Multiple Airlines logo]()
$308
This Mytrip deal was found by Cheapflights users on 8/12. 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 9/159:55 am -
2 stops30h 45m
Deal found 8/12![Multiple Airlines logo]()
$308
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/410:25 pm -
2 stops17h 55m
Deal found 8/15![Multiple Airlines logo]()
$309
This Icelandair deal was found by Cheapflights users on 8/14. 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.
Fri 10/1610:25 pm -
1 stop31h 30m
Deal found 8/14![Icelandair logo]()
$309
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.
Sat 10/246:15 am -
2 stops21h 45m
Deal found 8/15![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 10/177:42 pm -
2 stops32h 18m
Deal found 8/12![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/257:30 pm -
3 stops31h 05m
Deal found 8/14![Multiple Airlines logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/111:50 am -
2 stops36h 30m
Deal found 8/13![Multiple Airlines logo]()
$310
Find flight deals from Illinois to London
Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated August 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $661 (Kiwi.com) |
One-way from | $230 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $875 |
Good round-trip deal | $991 or less |
Good one-way deal | $447 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to London 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 2,558,603 searches. Data last updated August 16, 2026.
Use the filters below to find and compare flights from Illinois to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLondon
STL Lambert-St Louis - LGW London Gatwick
STLLGW
Lambert-St Louis
Fri 10/23
8:34 pm-10:00 am
1 stop31h 26m
London Gatwick
Tue 11/3
10:10 am-9:40 am
2 stops53h 30m
$610
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Fri 11/6
6:30 pm-9:05 pm
2 stops20h 35m
London Luton
Fri 11/13
9:45 pm-5:20 pm
2 stops25h 35m
$694
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Thu 10/29
7:30 pm-10:50 am
1 stop10h 20m
London Heathrow
Wed 11/18
12:15 pm-5:20 pm
1 stop11h 05m
$736
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Mon 10/5
7:25 pm-10:50 pm
2 stops21h 25m
London Luton
Tue 10/13
9:40 am-6:15 pm
2 stops14h 35m
$740
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Tue 10/27
7:30 pm-10:10 pm
2 stops21h 40m
London Luton
Tue 11/10
7:45 am-5:20 pm
2 stops15h 35m
$742
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Thu 12/10
6:30 pm-1:00 pm
1 stop12h 30m
London Luton
Tue 12/15
7:00 am-5:20 pm
1 stop16h 20m
$751
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Wed 10/28
8:00 pm-10:00 am
2 stops33h 00m
London Gatwick
Tue 11/3
4:35 pm-3:30 pm
1 stop28h 55m
$788
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 9/29
7:15 pm-7:55 pm
2 stops18h 40m
London Heathrow
Fri 10/23
7:05 am-4:10 pm
2 stops15h 05m
$822
ChicagoLondon
ORD Chicago O'Hare Intl - STN London Stansted
ORDSTN
Chicago O'Hare Intl
Wed 9/30
8:10 pm-4:40 pm
1 stop38h 30m
London Stansted
Tue 10/6
5:35 pm-9:40 am
1 stop22h 05m
$835
ChicagoLondon
ORD Chicago O'Hare Intl - STN London Stansted
ORDSTN
Chicago O'Hare Intl
Mon 11/9
11:45 am-4:20 pm
1 stop22h 35m
London Stansted
Tue 11/17
5:20 pm-10:00 am
1 stop22h 40m
$835
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to London
Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.
ORD-LHR
ORD-LTN
STL-LHR
ORD-LCY
ORD-LGW
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 Illinois to London
USIL-LON
ORD-LHR
ORD-LTN
STL-LHR
ORD-LCY
What is the cheapest month to book a flight from Illinois to London?
Currently, January is the cheapest month in which you can book a flight from Illinois to London (average of $661). Flying from Illinois to London in June is currently the most expensive (average of $1,384). 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 IL to LON?
Find hourly flight availability from Illinois to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to London as you normally would.
Weekly flight availability from Illinois to London
Explore weekly flight availability from Illinois to London. 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 16, 2026.
The most flights from USIL to LON are scheduled on a Friday (54 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (41 on average).
How much does it cost to fly round-trip from Illinois to London?
Airfare is typical for this route at the moment.
Illinois to London flights typically cost between $654 and $1,027 in September.The cheapest round-trip price found within the last 5 days was $665 on Multiple Airlines (Sep 28-Nov 18).
How far ahead should I book a flight from Illinois to London?
To ensure you get the cheapest price possible for a flight from Illinois to London, you should look to book at least 9 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.
Related info for your journey
Find useful and relevant information for your journey from Illinois to London. 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?
Book flights to London if you plan to visit one of these locationsIlford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
Harlow
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to London
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Complete your trip
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Search flights from Illinois to London by cabin class
Find flights from Illinois to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to London
Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 16, 2026.
Illinois and London flights
Browse other Illinois and London flight options. Last updated on August 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Illinois to London flights
Consider these flights traveling from Illinois to London.
Top 10 airlines flying from Illinois to London
Discover the top 10 airlines that operate flights from Illinois to London. 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 2,558,603 searches. Data last updated August 16, 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$430 | Average$560 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$458 | Average$786 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$476 | Average$633 | FlexibilityNo cancel fee | On-time77% | |
| 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 |