This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LON
9 Dec — 16 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to London are usually found in February or January, booked 73 days in advance, depart on a Monday or Sunday and return on a Wednesday
Cheap flight deals from Chicago to London
Enter your travel dates to find the best prices.
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Best
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Cheapest flights from Chicago to London
Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 November 2026.
Thu 10/1219:10 -
2 stops56h 25m
Mon 14/1206:40 -
2 stops40h 05m
Deal found 8/11£491
Sun 6/1218:30 -
1 stop14h 40m
Thu 10/1210:10 -
1 stop13h 10m
Deal found 5/11£498
Mon 7/1218:30 -
2 stops15h 50m
Fri 11/1215:15 -
3 stops32h 05m
Deal found 5/11£503
Mon 16/1118:30 -
2 stops15h 50m
Tue 24/1119:30 -
3 stops27h 50m
Deal found 8/11£505
Sun 13/1218:30 -
1 stop14h 40m
Thu 17/1210:10 -
1 stop13h 10m
Deal found 6/11£505
Tue 8/1218:30 -
2 stops15h 50m
Tue 15/1219:30 -
3 stops27h 50m
Deal found 8/11£508
Sun 6/1218:30 -
2 stops20h 50m
Thu 10/1219:50 -
3 stops27h 30m
Deal found 7/11£510
Mon 16/1118:30 -
2 stops15h 50m
Mon 23/1119:30 -
3 stops27h 50m
Deal found 9/11£511
Wed 9/1218:30 -
1 stop16h 55m
Mon 14/1207:40 -
1 stop15h 40m
Deal found 5/11£514
Wed 25/1118:30 -
1 stop19h 00m
Wed 2/1212:15 -
1 stop35h 05m
Deal found 4/11£516
Sat 5/1219:10 -
2 stops44h 10m
Tue 8/1207:05 -
2 stops39h 50m
Deal found 4/11£517
Tue 1/1218:30 -
1 stop10h 20m
Tue 8/1212:15 -
1 stop35h 05m
Deal found 6/11£517
Best flights from Chicago to London
Discover carefully curated flight deals from Chicago to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 November 2026.
Fri 5/219:10 -
2 stops32h 25m
Thu 18/219:50 -
2 stops26h 55m
Deal found 5/11£526
Sun 21/218:30 -
1 stop10h 20m
Thu 25/212:15 -
1 stop11h 05m
Deal found 8/11£586
Fri 19/221:50 -
Nonstop8h 10m
Sun 21/209:00 -
1 stop13h 15m
Deal found 8/11£631
Mon 5/417:10 -
1 stop16h 50m
Wed 14/417:00 -
2 stops22h 24m
Deal found 4/11£670
Sat 10/417:45 -
1 stop34h 05m
Sat 17/416:30 -
1 stop29h 30m
Deal found 8/11£676
Tue 8/1214:41 -
2 stops13h 49m
Thu 17/1208:40 -
1 stop11h 45m
Deal found 8/11£688
Sat 27/320:40 -
Nonstop7h 45m
Sat 3/410:20 -
1 stop13h 30m
Deal found 8/11£719
Wed 24/214:55 -
2 stops36h 55m
Tue 2/321:20 -
2 stops24h 10m
Deal found 5/11£812
Sun 29/1119:10 -
2 stops17h 40m
Sun 13/1206:40 -
1 stop16h 05m
Deal found 5/11£574
Sun 13/1218:30 -
1 stop10h 20m
Wed 13/120:35 -
1 stop26h 45m
Deal found 6/11£637
Wed 7/416:25 -
Nonstop8h 20m
Mon 12/416:25 -
1 stop27h 35m
Deal found 8/11£666
Wed 10/310:30 -
2 stops23h 30m
Wed 17/318:05 -
2 stops28h 40m
Deal found 6/11£610
Wed 25/1119:00 -
1 stop14h 05m
Wed 2/1209:35 -
2 stops59h 55m
Deal found 6/11£678
Wed 10/207:10 -
1 stop17h 15m
Sat 20/208:40 -
1 stop11h 45m
Deal found 5/11£696
Thu 11/315:45 -
Nonstop8h 10m
Fri 19/309:00 -
1 stop13h 15m
Deal found 7/11£692
Fri 12/218:25 -
1 stop15h 20m
Thu 18/210:00 -
1 stop12h 15m
Deal found 5/11£697
Thu 19/1109:59 -
2 stops17h 01m
Sun 22/1110:00 -
1 stop12h 15m
Deal found 4/11£804
Mon 4/117:45 -
Nonstop8h 10m
Mon 29/312:10 -
1 stop33h 45m
Deal found 7/11£700
Sat 27/314:30 -
2 stops37h 20m
Sat 3/421:15 -
2 stops24h 45m
Deal found 8/11£893
Thu 25/314:30 -
2 stops20h 20m
Tue 30/321:15 -
2 stops24h 45m
Deal found 8/11£824
Wed 25/1112:38 -
2 stops14h 22m
Tue 1/1210:00 -
1 stop12h 15m
Deal found 7/11£794
Wed 20/119:00 -
1 stop14h 05m
Mon 8/216:35 -
2 stops33h 33m
Deal found 4/11£833
Sat 5/1218:25 -
1 stop15h 20m
Mon 14/1210:00 -
1 stop12h 15m
Deal found 8/11£802
Tue 5/111:25 -
2 stops40h 00m
Tue 12/116:35 -
1 stop28h 55m
Deal found 7/11£850
Direct flights from Chicago to London
Explore direct flight options from Chicago to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 9 November 2026.
Mon 15/318:10 -
Nonstop7h 45m
Wed 31/316:05 -
Nonstop8h 54m
Deal found 5/11£538
Mon 29/322:00 -
Nonstop8h 00m
Tue 20/416:05 -
Nonstop8h 54m
Deal found 6/11£547
Tue 30/319:25 -
Nonstop8h 10m
Wed 21/411:10 -
Nonstop8h 40m
Deal found 4/11£553
Mon 29/319:25 -
Nonstop8h 10m
Thu 22/411:10 -
Nonstop8h 40m
Deal found 6/11£554
Mon 29/317:00 -
Nonstop7h 50m
Wed 21/413:30 -
Nonstop8h 55m
Deal found 6/11£556
Sat 27/318:10 -
Nonstop7h 45m
Thu 22/411:10 -
Nonstop8h 40m
Deal found 4/11£564
Sun 28/319:25 -
Nonstop8h 10m
Mon 19/411:10 -
Nonstop8h 40m
Deal found 4/11£570
Tue 30/317:00 -
Nonstop7h 50m
Mon 19/411:10 -
Nonstop8h 40m
Deal found 6/11£571
Sat 27/322:00 -
Nonstop8h 00m
Mon 19/411:10 -
Nonstop8h 40m
Deal found 6/11£572
Tue 30/317:00 -
Nonstop7h 50m
Sun 18/413:30 -
Nonstop8h 55m
Deal found 6/11£573
Sat 27/322:00 -
Nonstop8h 00m
Sun 18/416:05 -
Nonstop8h 54m
Deal found 6/11£577
Last-minute flights from Chicago to London
Discover last-minute flight deals from Chicago to London. Data last updated 9 November 2026 and is based on user searches.
Mon 16/1118:30 -
2 stops15h 50m
Tue 24/1119:30 -
3 stops27h 50m
Deal found 8/11£505
Mon 16/1118:30 -
2 stops15h 50m
Mon 23/1119:30 -
3 stops27h 50m
Deal found 9/11£511
Wed 25/1118:30 -
1 stop19h 00m
Wed 2/1212:15 -
1 stop35h 05m
Deal found 4/11£516
Tue 1/1218:30 -
1 stop19h 00m
Tue 8/1212:15 -
1 stop35h 05m
Deal found 8/11£517
Sat 5/1219:10 -
2 stops44h 10m
Tue 8/1207:05 -
2 stops39h 50m
Deal found 4/11£517
Sun 6/1218:30 -
1 stop14h 40m
Thu 10/1210:10 -
1 stop13h 10m
Deal found 5/11£498
Sun 6/1218:30 -
2 stops20h 50m
Thu 10/1219:50 -
3 stops27h 30m
Deal found 7/11£510
Mon 7/1218:30 -
2 stops15h 50m
Fri 11/1215:15 -
3 stops32h 05m
Deal found 5/11£503
Tue 8/1218:30 -
2 stops15h 50m
Tue 15/1219:30 -
3 stops27h 50m
Deal found 8/11£508
Wed 9/1218:30 -
1 stop16h 55m
Mon 14/1207:40 -
1 stop15h 40m
Deal found 5/11£514
Thu 10/1219:10 -
2 stops56h 25m
Mon 14/1206:40 -
2 stops40h 05m
Deal found 8/11£491
Sun 13/1218:30 -
1 stop14h 40m
Thu 17/1210:10 -
1 stop13h 10m
Deal found 6/11£505
One-way flights from Chicago to London
Search for one-way flight options from Chicago to London. Find affordable one-way fares based on user searches. Data last updated 9 November 2026.
Mon 15/220:40 -
Nonstop7h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£240
Sun 10/118:30 -
2 stops18h 20m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£240
Wed 28/417:00 -
Nonstop7h 50m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£240
Sun 22/1120:10 -
2 stops18h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/11£240
Wed 7/417:45 -
1 stop13h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£241
Sun 6/1218:30 -
2 stops32h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/11£242
Mon 15/212:01 -
1 stop13h 19m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£243
Sun 17/118:30 -
2 stops15h 50m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/11£243
Sat 6/320:50 -
1 stop27h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£243
Sun 6/1220:10 -
1 stop13h 35m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/11£243
Sun 14/322:50 -
Nonstop7h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/11£244
Mon 22/218:50 -
1 stop17h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 6/11£244
Find flight deals from Chicago to London
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 November 2026.
Customise your flight search to find flights from Chicago 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 9 November 2026.
Use the filters below to find and compare flights from Chicago to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
Fastest return journey
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 28/4
17:00-06:50
Nonstop7h 50m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£240
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 25/4
16:25-06:45
Nonstop8h 20m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£247
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Wed 21/4
17:10-16:00
1 stop16h 50m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£250
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 21/2
14:35-10:50
2 stops14h 15m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£250
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sat 24/4
21:30-21:20
1 stop17h 50m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£250
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Tue 4/5
14:20-08:25
1 stop12h 05m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£252
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Wed 10/3
18:10-15:45
2 stops15h 35m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£254
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Mon 15/3
18:10-15:45
2 stops16h 35m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£254
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Wed 28/4
22:25-18:25
2 stops14h 00m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£259
ChicagoLondon
ORD Chicago O'Hare Intl - LGW London Gatwick
ORDLGW
Chicago O'Hare Intl
Fri 15/1
20:10-15:45
1 stop13h 35m
London Gatwick
Wed 31/12
00:00-17:00
Nonstop0h 00m
£261
Flights are sorted by cheapest return flights first.
Deals found on 8/11
Showing 1-10 of 47 resultsSorted by cheapest first
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Best time to book a flight from Chicago to London
Have a flexible travel schedule? Discover the best time to fly to London from Chicago with our price prediction graph.
CHI-LON
ORD-LHR
ORD-LGW
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Chicago to London
CHI-LON
ORD-LHR
ORD-LGW
What is the cheapest month to book a flight from Chicago to London?
Currently, January is the cheapest month in which you can book a flight from Chicago to London (average of £479). Flying from Chicago to London in June is currently the most expensive (average of £1,038). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from CHI to LON?
Find hourly flight availability from Chicago 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 9 November 2026.
When flying from Chicago to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Chicago to London
Explore weekly flight availability from Chicago 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 9 November 2026.
The most flights from CHI to LON are scheduled on a Friday (45 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (39 on average).
How much does it cost for a return flight from Chicago to London?
Airfare is typical for this route at the moment.
Chicago to London flights typically cost between £474 and £731 in February.The cheapest return price found within the last 5 days was £487 on Multiple Airlines (7 Feb–10 Feb).
What’s the top stopover airport for flights from Chicago to London?
Share of one-stop return flights from Chicago to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Dublin (DUB) – chosen by Cheapflights users on 42% of one-stop itineraries from Chicago to London on Cheapflights.
What’s the cheapest stopover airport for flights from Chicago to London?
Average return fare for one-stop flights from Chicago to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £572.
What’s the fastest stopover option from Chicago to London?
Shortest average travel time for one-stop one-way flights from Chicago to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 10h 21m.
Which airport typically offers the quickest stopover for flights from Chicago to London?
Average stopover duration for one-stop one-way flights from Chicago to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 56m.
How often are flights from Chicago to London delayed?
About 23% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 161 minutes.
What is the most punctual flight time for Chicago to London flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Chicago to London flights?
Over the past year, American Airlines have had the lowest number of delays on this route, with just 22% of flights being delayed.
How far ahead should I book a flight from Chicago to London?
The best time to book flights from Chicago to London is 28 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing London
Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 9 November 2026.
Read reviews from past customers who have flown with Aer Lingus,United Airlines, andAmerican Airlines
from Chicago to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Flew Man to BGI. Crew were poor. Both coffee or tea due to a "water issue". Business class meal for gluten free was disappointing. 1903 lounge was excellent.
Related info for your journey
Find useful and relevant information for your journey from Chicago to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
How long is the flight from Chicago to London?
Scandinavian Airlines, Icelandair, and United Airlines can get you from Chicago to London in just under 8h 10m. Your travel time can differ by up to 24h 15m. There are 3939 mi between Chicago and London. This flight may include one or multiple stops.
What are the cheapest airlines flying from Chicago to London round-trip?
Our cheapest airline available from Chicago to London is Icelandair. Our recent data shows that you can find tickets from as low as £369 on this airline. Additional options worth looking into are British Airways and United Airlines, starting at £473 and £511 round-trip. These flights start at 44% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Chicago to London one-way?
£288 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on Lufthansa and American Airlines, with prices starting from £293 and £298, respectively.
What are the most popular routes from Chicago to London?
The most popular route from Chicago to London is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London Stansted.
What are the most reliable airlines from Chicago to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to London on time: Royal Jordanian (88%), Air Canada (84%), Austrian Airlines (84%).
What are the cheapest flights from Chicago to London?
On average you can expect to pay £733 for a flight from Chicago to London. The cheapest flight overall is £231 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at £407.
Can I find deals for business class flights from Chicago to London?
Yes. Cheapflights offers flight deals from Chicago to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago to London?
Currently, January is the cheapest month in which you can book a flight from Chicago to London (average of £479). Flying from Chicago to London in June is currently the most expensive (average of £1,038). 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.
Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 9 November 2026.
Discover the top 7 airlines that operate flights from Chicago 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 9 November 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Chicago to London?
Cheapflights makes it easy to find Chicago to London flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Chicago to London?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from Chicago.
Can Cheapflights find flights from Chicago to London with no change fees?
Yes! Cheapflights helps users easily find flights from Chicago to London with no change fees.
Can Cheapflights notify me if prices for flights from Chicago to London become cheaper?
Yes! Start tracking prices for Chicago to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.
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