$265+ Cheap flights from Illinois to London (LON)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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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 September 20, 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 September 20, 2026.
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Wed 10/1412:10 pm -
2 stops25h 35m
Wed 10/217:10 am -
2 stops19h 10m
Deal found 9/15![Multiple Airlines logo]()
$633
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Wed 12/212:02 pm -
2 stops36h 48m
Tue 12/89:35 am -
1 stop20h 37m
Deal found 9/20![Multiple Airlines logo]()
$642
This Booking.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/1412:10 pm -
2 stops23h 00m
Wed 10/217:45 am -
2 stops18h 35m
Deal found 9/15![Multiple Airlines logo]()
$648
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Wed 12/212:02 pm -
2 stops36h 48m
Wed 12/99:45 am -
1 stop20h 27m
Deal found 9/20![Multiple Airlines logo]()
$690
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Tue 12/16:05 pm -
1 stop30h 50m
Tue 12/89:35 am -
1 stop21h 06m
Deal found 9/19![Multiple Airlines logo]()
$700
This lol.travel deal was found by Cheapflights users on 9/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:10 pm -
1 stop12h 20m
Wed 10/218:40 am -
2 stops16h 01m
Deal found 9/16![Air Canada logo]()
$717
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:13 pm -
1 stop33h 47m
Tue 12/89:35 am -
1 stop20h 37m
Deal found 9/16![Multiple Airlines logo]()
$721
This lol.travel deal was found by Cheapflights users on 9/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:10 pm -
1 stop11h 40m
Tue 10/139:45 am -
1 stop20h 34m
Deal found 9/16![Finnair logo]()
$726
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sun 10/48:55 am -
2 stops22h 00m
Tue 10/136:30 am -
2 stops19h 50m
Deal found 9/20![Multiple Airlines logo]()
$726
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Mon 11/306:35 pm -
2 stops30h 15m
Tue 12/89:35 am -
1 stop20h 37m
Deal found 9/20![Multiple Airlines logo]()
$732
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:20 pm -
1 stop20h 05m
Sun 10/116:00 am -
1 stop15h 55m
Deal found 9/19![SWISS logo]()
$734
This Virgin Atlantic deal was found by Cheapflights users on 9/18. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:00 pm -
1 stop18h 15m
Tue 10/68:55 am -
2 stops19h 38m
Deal found 9/18![Virgin Atlantic logo]()
$734
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 September 20, 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 September 20, 2026.
This Virgin Atlantic deal was found by Cheapflights users on 9/16. 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.
Sun 9/271:19 pm -
1 stop11h 51m
Tue 10/68:55 am -
2 stops19h 38m
Deal found 9/16![Virgin Atlantic logo]()
$735
This Delta deal was found by Cheapflights users on 9/18. 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.
Tue 11/34:19 pm -
1 stop13h 21m
Tue 11/108:40 am -
2 stops15h 24m
Deal found 9/18![Delta logo]()
$738
This KLM deal was found by Cheapflights users on 9/15. 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.
Tue 9/291:00 pm -
1 stop11h 25m
Wed 10/143:15 pm -
1 stop13h 18m
Deal found 9/15![KLM logo]()
$746
This United Airlines deal was found by Cheapflights users on 9/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/113:45 pm -
Nonstop8h 10m
Mon 2/1512:05 pm -
1 stop34h 10m
Deal found 9/18![United Airlines logo]()
$771
This Mytrip deal was found by Cheapflights users on 9/16. 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.
Fri 11/66:30 pm -
2 stops21h 10m
Fri 11/1312:45 pm -
1 stop11h 35m
Deal found 9/16![Multiple Airlines logo]()
$776
This Finnair deal was found by Cheapflights users on 9/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:35 pm -
Nonstop8h 00m
Sun 11/154:30 pm -
Nonstop9h 00m
Deal found 9/16![Finnair logo]()
$781
This Turkish Airlines deal was found by Cheapflights users on 9/18. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:15 pm -
1 stop31h 40m
Tue 12/15:20 pm -
1 stop22h 40m
Deal found 9/18![Turkish Airlines logo]()
$834
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:24 am -
2 stops16h 56m
Wed 10/217:05 am -
2 stops15h 05m
Deal found 9/15![Scandinavian Airlines logo]()
$866
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/19. 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.
Fri 11/68:10 pm -
1 stop13h 35m
Tue 11/104:35 pm -
1 stop28h 55m
Deal found 9/19![TAP AIR PORTUGAL logo]()
$901
This British Airways deal was found by Cheapflights users on 9/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/138:40 pm -
Nonstop7h 45m
Sun 12/203:40 pm -
Nonstop9h 05m
Deal found 9/19![British Airways logo]()
$969
This SWISS deal was found by Cheapflights users on 9/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/54:10 pm -
1 stop14h 40m
Mon 11/97:05 pm -
1 stop23h 35m
Deal found 9/17![SWISS logo]()
$1,226
This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 11/21:27 pm -
1 stop11h 38m
Wed 11/116:30 am -
2 stops17h 34m
Deal found 9/15![Delta logo]()
$739
This Virgin Atlantic deal was found by Cheapflights users on 9/15. 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.
Wed 9/301:19 pm -
1 stop11h 51m
Wed 10/141:25 pm -
1 stop15h 08m
Deal found 9/15![Virgin Atlantic logo]()
$745
This United Airlines deal was found by Cheapflights users on 9/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:35 pm -
Nonstop8h 25m
Sun 11/11:45 pm -
1 stop32h 30m
Deal found 9/18![United Airlines logo]()
$774
This Mytrip deal was found by Cheapflights users on 9/19. 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 11/116:30 pm -
2 stops17h 35m
Wed 12/27:25 am -
2 stops15h 55m
Deal found 9/19![Multiple Airlines logo]()
$776
This Delta deal was found by Cheapflights users on 9/15. 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 9/301:19 pm -
1 stop11h 51m
Tue 10/1310:45 am -
1 stop13h 15m
Deal found 9/15![Delta logo]()
$746
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/116:35 pm -
Nonstop8h 25m
Sat 10/174:25 pm -
1 stop26h 10m
Deal found 9/15![United Airlines logo]()
$779
This Turkish Airlines deal was found by Cheapflights users on 9/19. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:10 pm -
1 stop31h 45m
Tue 11/175:20 pm -
1 stop22h 40m
Deal found 9/19![Turkish Airlines logo]()
$863
This Virgin Atlantic deal was found by Cheapflights users on 9/16. 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.
Fri 11/612:27 pm -
1 stop12h 38m
Fri 11/138:55 am -
2 stops19h 59m
Deal found 9/16![Virgin Atlantic logo]()
$787
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:30 pm -
2 stops20h 00m
Fri 10/166:20 am -
2 stops14h 35m
Deal found 9/17![Multiple Airlines logo]()
$804
This Delta deal was found by Cheapflights users on 9/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/411:39 am -
2 stops22h 06m
Wed 11/1110:00 am -
2 stops18h 54m
Deal found 9/20![Delta logo]()
$756
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/15. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/207:00 pm -
1 stop14h 05m
Fri 1/299:35 pm -
2 stops47h 55m
Deal found 9/15![TAP AIR PORTUGAL logo]()
$926
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Wed 10/712:10 pm -
1 stop12h 20m
Thu 10/152:10 pm -
1 stop12h 10m
Deal found 9/17![United Airlines logo]()
$779
This Virgin Atlantic deal was found by Cheapflights users on 9/17. 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.
Wed 11/1811:27 am -
2 stops13h 23m
Sun 11/226:30 am -
2 stops16h 09m
Deal found 9/17![Virgin Atlantic logo]()
$790
This Turkish Airlines deal was found by Cheapflights users on 9/19. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:10 pm -
1 stop31h 45m
Mon 10/1910:50 am -
1 stop28h 50m
Deal found 9/19![Turkish Airlines logo]()
$873
This Mytrip deal was found by Cheapflights users on 9/16. 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.
Tue 11/101:55 pm -
2 stops15h 50m
Sun 11/299:30 pm -
2 stops26h 55m
Deal found 9/16![Multiple Airlines logo]()
$805
This Finnair deal was found by Cheapflights users on 9/18. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:10 pm -
Nonstop7h 45m
Mon 11/304:30 pm -
Nonstop8h 55m
Deal found 9/18![Finnair logo]()
$977
This Delta deal was found by Cheapflights users on 9/15. 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 12/212:36 pm -
1 stop13h 14m
Fri 12/116:30 am -
2 stops15h 54m
Deal found 9/15![Delta logo]()
$776
This Virgin Atlantic deal was found by Cheapflights users on 9/17. 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.
Wed 12/29:37 am -
2 stops15h 13m
Sun 12/66:30 am -
2 stops17h 31m
Deal found 9/17![Virgin Atlantic logo]()
$790
This Turkish Airlines deal was found by Cheapflights users on 9/18. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:10 pm -
1 stop31h 45m
Fri 10/235:35 pm -
1 stop22h 05m
Deal found 9/18![Turkish Airlines logo]()
$874
Last-minute flights from Illinois to LondonDiscover last-minute flight deals from Illinois to London. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to London. Data last updated September 20, 2026 and is based on user searches.
This Virgin Atlantic deal was found by Cheapflights users on 9/18. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:00 pm -
1 stop18h 15m
Tue 10/68:55 am -
2 stops19h 38m
Deal found 9/18![Virgin Atlantic logo]()
$734
This Delta deal was found by Cheapflights users on 9/17. 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.
Sun 9/271:19 pm -
1 stop11h 51m
Tue 10/69:20 am -
1 stop12h 54m
Deal found 9/17![Delta logo]()
$735
This lastminute.com deal was found by Cheapflights users on 9/19. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/274:15 pm -
1 stop10h 35m
Tue 10/69:20 am -
1 stop10h 55m
Deal found 9/19![Virgin Atlantic logo]()
$735
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sun 9/2711:05 am -
2 stops19h 50m
Tue 10/610:00 pm -
2 stops22h 55m
Deal found 9/20![Multiple Airlines logo]()
$735
This United Airlines deal was found by Cheapflights users on 9/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:25 pm -
Nonstop8h 20m
Fri 1/297:40 am -
Nonstop9h 05m
Deal found 9/18![United Airlines logo]()
$735
This lol.travel deal was found by Cheapflights users on 9/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:10 pm -
1 stop11h 40m
Tue 10/139:45 am -
1 stop20h 34m
Deal found 9/16![Finnair logo]()
$726
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sun 10/48:55 am -
2 stops22h 00m
Tue 10/136:30 am -
2 stops19h 50m
Deal found 9/20![Multiple Airlines logo]()
$726
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:20 pm -
1 stop12h 05m
Mon 10/126:35 pm -
1 stop24h 00m
Deal found 9/17![SWISS logo]()
$735
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:20 pm -
1 stop20h 05m
Sun 10/116:00 am -
1 stop15h 55m
Deal found 9/19![SWISS logo]()
$734
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Wed 10/1412:10 pm -
2 stops25h 35m
Wed 10/217:10 am -
2 stops19h 10m
Deal found 9/15![Multiple Airlines logo]()
$633
This Booking.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/1412:10 pm -
2 stops23h 00m
Wed 10/217:45 am -
2 stops18h 35m
Deal found 9/15![Multiple Airlines logo]()
$648
This lol.travel deal was found by Cheapflights users on 9/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:10 pm -
1 stop12h 20m
Wed 10/218:40 am -
2 stops16h 01m
Deal found 9/16![Air Canada logo]()
$717
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 September 20, 2026.
Search for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 12/56:13 pm -
1 stop32h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Mon 10/266:35 pm -
2 stops31h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Mon 12/712:02 pm -
2 stops36h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$296
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:30 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Icelandair logo]()
$299
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Fri 11/66:30 pm -
2 stops20h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$299
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/136:30 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Icelandair logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:25 pm -
2 stops26h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$299
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.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
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Icelandair logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Fri 11/136:30 pm -
2 stops21h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Fri 11/136:30 pm -
3 stops17h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:30 pm -
2 stops23h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$300
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:25 pm -
1 stop31h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Icelandair logo]()
$301
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 September 20, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $633 (Mytrip) |
One-way from | $265 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $905 |
Good round-trip deal | $876 or less |
Good one-way deal | $453 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 7,457,451 searches. Data last updated September 20, 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
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Wed 10/7
10:25 pm-10:45 pm
2 stops42h 20m
London Luton
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$301
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Thu 11/12
6:30 pm-10:00 pm
2 stops21h 30m
London Luton
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$306
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Mon 9/28
7:25 pm-3:30 pm
3 stops38h 05m
London Luton
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$307
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Wed 11/4
6:30 pm-10:10 pm
3 stops21h 40m
London Luton
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$310
ChicagoLondon
ORD Chicago O'Hare Intl - LTN London Luton
ORDLTN
Chicago O'Hare Intl
Tue 10/13
2:15 pm-3:30 pm
2 stops19h 15m
London Luton
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$316
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sat 3/6
6:30 pm-10:50 am
1 stop10h 20m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$321
Quickest round-trip
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 3/17
10:50 pm-11:35 am
Nonstop7h 45m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 3/16
10:50 pm-11:35 am
Nonstop7h 45m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 10/21
9:38 am-6:30 am
1 stop14h 52m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$329
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 12/30
2:25 pm-10:50 am
2 stops14h 25m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$329
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.
MDW-LHR
ORD-LHR
ORD-LTN
ORD-STN
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
MDW-LHR
ORD-LHR
ORD-LTN
ORD-STN
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 $656). Flying from Illinois to London in June is currently the most expensive (average of $1,383). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from 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 September 20, 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 September 20, 2026.
The most flights from USIL to LON are scheduled on a Monday (54 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (45 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 $713 and $1,020 in October.The cheapest round-trip price found within the last 5 days was $734 on SWISS (Oct 7-Oct 11).
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 65 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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
Gatwick
Hounslow
Harrow
Wembley
Southend-on-Sea
Basingstoke
Watford
Dartford
Winchester
Croydon
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
See prices for flight routes from nearby airports that may be better suited for you.
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 September 20, 2026.
Illinois and London flights
Browse other Illinois and London flight options. Last updated on September 20, 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 7,457,451 searches. Data last updated September 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$286 | Average$1,411 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$362 | Average$890 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$430 | Average$595 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$432 | Average$728 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$458 | Average$823 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$476 | Average$685 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$575 | Average$934 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$596 | Average$929 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$609 | Average$916 | FlexibilityNo cancel fee | On-time77% |