$320+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LON
Nov 7 — Nov 141
Round-trip
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to London
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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 October 8, 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 October 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:10 pm -
1 stop14h 50m
Tue 11/246:40 am -
1 stop16h 05m
Deal found 10/3![Scandinavian Airlines logo]()
$724
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:10 pm -
1 stop14h 50m
Tue 11/177:05 am -
2 stops15h 40m
Deal found 10/7![Scandinavian Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
1 stop12h 15m
Tue 11/107:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
1 stop14h 30m
Sat 11/146:15 am -
1 stop16h 30m
Deal found 10/4![Multiple Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
1 stop16h 30m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/6![Scandinavian Airlines logo]()
$726
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:10 pm -
1 stop12h 15m
Sat 11/147:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$726
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:10 pm -
2 stops59h 45m
Mon 11/910:20 am -
1 stop12h 25m
Deal found 10/6![Scandinavian Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
1 stop12h 15m
Sun 11/87:00 am -
1 stop15h 45m
Deal found 10/5![Multiple Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:10 pm -
1 stop14h 50m
Fri 11/206:40 am -
1 stop16h 05m
Deal found 10/5![Scandinavian Airlines logo]()
$728
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
1 stop14h 30m
Sat 11/76:15 am -
1 stop16h 30m
Deal found 10/5![Multiple Airlines logo]()
$728
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 pm -
2 stops15h 10m
Mon 10/191:55 pm -
2 stops32h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$729
This Mytrip deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
3 stops33h 05m
Tue 11/107:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$729
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 October 8, 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 October 8, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:10 pm -
2 stops20h 25m
Tue 12/86:05 pm -
2 stops28h 50m
Deal found 10/3![Scandinavian Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/110:35 am -
1 stop19h 25m
Wed 3/39:00 am -
2 stops18h 24m
Deal found 10/4![United Airlines logo]()
$796
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm -
1 stop31h 40m
Fri 11/139:35 pm -
2 stops47h 55m
Deal found 10/7![TAP AIR PORTUGAL logo]()
$814
This Turkish Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/1211:45 am -
1 stop16h 10m
Tue 1/195:20 pm -
1 stop22h 40m
Deal found 10/3![Turkish Airlines logo]()
$831
This Delta deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/245:00 pm -
1 stop12h 40m
Wed 3/310:00 am -
2 stops18h 30m
Deal found 10/4![Delta logo]()
$885
This Virgin Atlantic deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2411:00 am -
2 stops14h 55m
Wed 3/310:00 am -
2 stops18h 30m
Deal found 10/4![Virgin Atlantic logo]()
$889
This Expedia deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/173:10 pm -
1 stop14h 15m
Tue 3/237:30 am -
2 stops22h 09m
Deal found 10/7![British Airways logo]()
$902
This British Airways deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/173:10 pm -
1 stop15h 25m
Tue 3/237:30 am -
2 stops22h 09m
Deal found 10/8![Multiple Airlines logo]()
$930
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/173:10 pm -
1 stop15h 25m
Tue 3/233:40 pm -
1 stop13h 59m
Deal found 10/5![American Airlines logo]()
$956
This KLM deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:10 am -
1 stop19h 40m
Mon 12/1410:50 am -
1 stop18h 11m
Deal found 10/6![KLM logo]()
$991
This SWISS deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:35 pm -
2 stops14h 15m
Fri 11/206:40 pm -
1 stop24h 00m
Deal found 10/5![SWISS logo]()
$1,328
This Scandinavian Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:10 pm -
1 stop17h 20m
Wed 12/166:05 pm -
2 stops28h 40m
Deal found 10/3![Scandinavian Airlines logo]()
$786
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:10 pm -
1 stop13h 35m
Thu 11/2610:10 am -
2 stops35h 20m
Deal found 10/7![TAP AIR PORTUGAL logo]()
$814
This Turkish Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1112:45 pm -
1 stop15h 10m
Thu 3/1810:55 am -
1 stop29h 05m
Deal found 10/5![Turkish Airlines logo]()
$831
This United Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/249:50 pm -
Nonstop8h 10m
Tue 3/29:00 am -
1 stop13h 15m
Deal found 10/7![United Airlines logo]()
$858
This Scandinavian Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:10 pm -
2 stops31h 45m
Thu 12/176:40 am -
1 stop16h 05m
Deal found 10/3![Scandinavian Airlines logo]()
$786
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/174:00 pm -
1 stop10h 50m
Tue 3/2311:45 am -
2 stops28h 32m
Deal found 10/3![Delta logo]()
$891
This Virgin Atlantic deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2511:19 am -
2 stops13h 56m
Thu 12/37:45 am -
1 stop12h 40m
Deal found 10/6![Virgin Atlantic logo]()
$929
This British Airways deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/186:00 am -
1 stop18h 55m
Thu 1/217:40 pm -
2 stops34h 35m
Deal found 10/4![Multiple Airlines logo]()
$940
This British Airways deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1710:50 pm -
Nonstop7h 45m
Mon 3/2211:00 am -
Nonstop8h 45m
Deal found 10/5![British Airways logo]()
$942
This Turkish Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/1411:45 am -
1 stop16h 10m
Tue 2/235:20 pm -
1 stop22h 40m
Deal found 10/6![Turkish Airlines logo]()
$862
This United Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/59:30 pm -
Nonstop8h 25m
Tue 4/206:50 am -
1 stop11h 10m
Deal found 10/5![United Airlines logo]()
$864
This Scandinavian Airlines deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
1 stop16h 30m
Thu 11/125:00 pm -
1 stop29h 45m
Deal found 10/7![Scandinavian Airlines logo]()
$805
This Virgin Atlantic deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/294:25 pm -
1 stop18h 10m
Fri 12/118:40 am -
2 stops16h 05m
Deal found 10/7![Virgin Atlantic logo]()
$934
This Turkish Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1011:45 am -
1 stop16h 10m
Tue 2/235:20 pm -
1 stop22h 40m
Deal found 10/6![Turkish Airlines logo]()
$862
This British Airways deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/176:48 pm -
1 stop10h 37m
Tue 3/2311:00 am -
1 stop14h 25m
Deal found 10/3![British Airways logo]()
$956
This Delta deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/86:01 am -
1 stop20h 59m
Sun 3/148:55 am -
1 stop18h 28m
Deal found 10/5![Delta logo]()
$966
This American Airlines deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1910:56 am -
2 stops14h 09m
Thu 11/263:35 pm -
2 stops24h 14m
Deal found 10/5![American Airlines logo]()
$1,067
This United Airlines deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/289:30 pm -
Nonstop8h 25m
Thu 4/111:05 am -
Nonstop9h 05m
Deal found 10/6![United Airlines logo]()
$897
This Finnair deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:37 pm -
1 stop11h 58m
Tue 11/173:40 pm -
1 stop14h 23m
Deal found 10/8![Multiple Airlines logo]()
$1,001
Last-minute flights from Illinois to LondonDiscover last-minute flight deals from Illinois to London. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to London. Data last updated October 8, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 pm -
2 stops15h 10m
Mon 10/191:55 pm -
2 stops32h 15m
Deal found 10/5![Scandinavian Airlines logo]()
$729
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
1 stop14h 30m
Sat 11/146:15 am -
1 stop16h 30m
Deal found 10/4![Multiple Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
1 stop14h 30m
Sat 11/76:15 am -
1 stop16h 30m
Deal found 10/5![Multiple Airlines logo]()
$728
This Mytrip deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:10 pm -
3 stops33h 05m
Tue 11/107:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$729
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
1 stop12h 15m
Tue 11/107:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
1 stop12h 15m
Sun 11/87:00 am -
1 stop15h 45m
Deal found 10/5![Multiple Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:10 pm -
1 stop12h 15m
Sat 11/147:00 am -
1 stop15h 45m
Deal found 10/4![Multiple Airlines logo]()
$726
This Justfly.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/57:10 pm -
2 stops59h 45m
Mon 11/910:20 am -
1 stop12h 25m
Deal found 10/6![Scandinavian Airlines logo]()
$727
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
1 stop16h 30m
Tue 11/176:40 am -
1 stop16h 05m
Deal found 10/6![Scandinavian Airlines logo]()
$726
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:10 pm -
1 stop14h 50m
Tue 11/177:05 am -
2 stops15h 40m
Deal found 10/7![Scandinavian Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:10 pm -
1 stop14h 50m
Fri 11/206:40 am -
1 stop16h 05m
Deal found 10/5![Scandinavian Airlines logo]()
$728
This Kiwi.com deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:10 pm -
1 stop14h 50m
Tue 11/246:40 am -
1 stop16h 05m
Deal found 10/3![Scandinavian Airlines logo]()
$724
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 October 8, 2026.
Search for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated October 8, 2026.
This oojo deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:30 pm -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Icelandair logo]()
$320
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/237:50 pm -
1 stop18h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![SWISS logo]()
$321
This deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/306:30 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Icelandair logo]()
$321
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/115:10 pm -
Nonstop7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![British Airways logo]()
$322
This Flightnetwork deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/38:05 pm -
1 stop14h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Aer Lingus logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/53:45 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Aer Lingus logo]()
$324
This Justfly.com deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:30 pm -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Icelandair logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:30 pm -
2 stops31h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Multiple Airlines logo]()
$324
This British Airways deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/55:00 pm -
Nonstop7h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![British Airways logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:30 pm -
2 stops39h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/117:05 am -
1 stop19h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:30 pm -
2 stops31h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$326
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 October 8, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $724 (Justfly.com) |
One-way from | $320 (oojo) |
Popular in | June |
Cheapest in | February |
Average price | $812 |
Good round-trip deal | $781 or less |
Good one-way deal | $445 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from 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 October 8, 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 - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 1/6
3:45 pm-5:55 am
Nonstop8h 10m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$325
Quickest round-trip
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 1/5
9:50 pm-11:35 am
Nonstop7h 45m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$326
ChicagoLondon
ORD Chicago O'Hare Intl - STN London Stansted
ORDSTN
Chicago O'Hare Intl
Thu 12/31
6:30 pm-9:55 pm
2 stops21h 25m
London Stansted
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$327
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Thu 11/26
11:00 am-6:55 am
1 stop13h 55m
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
Tue 1/5
12:15 pm-9:55 am
2 stops15h 40m
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
Tue 11/10
1:00 pm-6:55 am
1 stop11h 55m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$329
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Thu 12/31
6:30 pm-10:55 am
1 stop10h 25m
London Gatwick
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$333
BloomingtonLondon
BMI Bloomington-Normal - LHR London Heathrow
BMILHR
Bloomington-Normal
Mon 3/22
12:00 pm-9:00 am
1 stop16h 00m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$334
BloomingtonLondon
BMI Bloomington-Normal - LHR London Heathrow
BMILHR
Bloomington-Normal
Mon 3/22
4:00 pm-10:30 am
2 stops13h 30m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$334
BloomingtonLondon
BMI Bloomington-Normal - LHR London Heathrow
BMILHR
Bloomington-Normal
Mon 3/22
6:01 am-7:50 am
1 stop20h 49m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$334
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-LGW
ORD-STN
MLI-LHR
SPI-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 Illinois to London
USIL-LON
ORD-LHR
ORD-LGW
ORD-STN
MLI-LHR
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 $641). 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 October 8, 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 October 8, 2026.
The most flights from USIL to LON are scheduled on a Wednesday (56 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 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 $663 and $966 in January.The cheapest round-trip price found within the last 5 days was $724 on TAP AIR PORTUGAL (Jan 22-Jan 31).
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
Wembley
Harrow
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
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Complete your trip
Complete your trip to London by adding a car rental and/or hotel reservation to your travel itinerary.
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 October 8, 2026.
Illinois and London flights
Browse other Illinois and London flight options. Last updated on October 8, 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 October 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$39 | Average$786 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$286 | Average$1,411 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$362 | Average$920 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$430 | Average$592 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$432 | Average$728 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$698 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$549 | Average$925 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$599 | Average$919 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$606 | Average$929 | FlexibilityNo cancel fee | On-timeN/A |