Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £240
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.
ORD — LHR
9 Dec — 16 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in January or February, booked 2 days in advance, depart on a Monday or Wednesday and return on a Wednesday
Cheap flight deals from O'Hare Intl to Heathrow
Enter your travel dates to find the best prices.
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One-way
Cheapest flights from O'Hare Intl to Heathrow
Explore the most affordable flight options available from O'Hare Intl to Heathrow. 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 -
2 stops20h 50m
Thu 10/1219:50 -
3 stops27h 30m
Deal found 7/11£510
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
Wed 9/1219:10 -
2 stops56h 25m
Sun 13/1206:40 -
1 stop16h 05m
Deal found 4/11£518
Mon 7/1218:30 -
3 stops33h 05m
Fri 11/1206:40 -
2 stops16h 40m
Deal found 5/11£522
Tue 17/1118:30 -
3 stops33h 05m
Tue 24/1106:40 -
2 stops16h 40m
Deal found 4/11£523
Wed 2/1218:30 -
1 stop19h 00m
Wed 9/1212:15 -
1 stop35h 05m
Deal found 6/11£525
Sun 6/1218:30 -
1 stop19h 00m
Thu 10/1212:15 -
1 stop35h 05m
Deal found 6/11£526
Best flights from O'Hare Intl to Heathrow
Discover carefully curated flight deals from O'Hare Intl to Heathrow 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
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
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 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
Mon 4/117:45 -
Nonstop8h 10m
Mon 29/312:10 -
1 stop33h 45m
Deal found 7/11£700
Direct flights from O'Hare Intl to Heathrow
Explore direct flight options from O'Hare Intl to Heathrow 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 O'Hare Intl to Heathrow
Discover last-minute flight deals from O'Hare Intl to Heathrow. Data last updated 9 November 2026 and is based on user searches.
Tue 17/1118:30 -
3 stops33h 05m
Tue 24/1106:40 -
2 stops16h 40m
Deal found 4/11£523
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
Wed 2/1218:30 -
1 stop19h 00m
Wed 9/1212:15 -
1 stop35h 05m
Deal found 6/11£525
Sat 5/1219:10 -
2 stops44h 10m
Tue 8/1207:05 -
2 stops39h 50m
Deal found 4/11£517
Sun 6/1218:30 -
2 stops20h 50m
Thu 10/1219:50 -
3 stops27h 30m
Deal found 7/11£510
Sun 6/1218:30 -
1 stop19h 00m
Thu 10/1212:15 -
1 stop35h 05m
Deal found 6/11£526
Mon 7/1218:30 -
3 stops33h 05m
Fri 11/1206:40 -
2 stops16h 40m
Deal found 5/11£522
Wed 9/1219:10 -
2 stops56h 25m
Sun 13/1206:40 -
1 stop16h 05m
Deal found 4/11£518
Thu 10/1219:10 -
2 stops56h 25m
Mon 14/1206:40 -
2 stops40h 05m
Deal found 8/11£491
One-way flights from O'Hare Intl to Heathrow
Search for one-way flight options from O'Hare Intl to Heathrow. 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
Wed 28/417:00 -
Nonstop7h 50m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£240
Wed 7/417:45 -
1 stop13h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£241
Mon 15/212:01 -
1 stop13h 19m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£243
Sat 6/320:50 -
1 stop27h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£243
Sun 14/322:50 -
Nonstop7h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/11£244
Wed 3/217:10 -
Nonstop7h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/11£245
Thu 18/314:30 -
1 stop11h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/11£246
Mon 25/118:30 -
2 stops20h 50m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£246
Mon 15/215:45 -
Nonstop8h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£247
Sat 3/417:45 -
1 stop18h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£248
Mon 15/213:55 -
1 stop11h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£249
Find flight deals from O'Hare Intl to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 November 2026.
Customise your flight search to find flights from O'Hare Intl to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 9 November 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London Heathrow Airport 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 - 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 - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sat 24/4
19:25-09:35
Nonstop8h 10m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£284
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Thu 18/3
08:45-21:00
2 stops55h 15m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£289
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Sun 24/1
14:55-22:40
2 stops25h 45m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£410
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Mon 7/12
09:59-07:20
2 stops15h 21m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£422
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 30/12
06:25-06:25
1 stop18h 00m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£422
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Fri 22/1
14:55-21:35
2 stops24h 40m
London Heathrow
Wed 31/12
00:00-17:00
Nonstop0h 00m
£424
Flights are sorted by cheapest return flights first.
Deals found on 8/11
Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from O'Hare Intl to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from O'Hare Intl with our price prediction graph.
ORD-LHR
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 O'Hare Intl Airport to London Heathrow Airport
Prices
Airlines
Delays
More
How far ahead should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?
The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 1 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.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £508). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £1,032). 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 ORD to LHR?
Find hourly flight availability from O'Hare Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 November 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to London Heathrow Airport as you normally would.
How much does it cost for a return flight from Chicago O'Hare Intl Airport to London Heathrow Airport?
Airfare is below average for this route at the moment.
Chicago O'Hare Intl Airport to London Heathrow Airport flights typically cost between £550 and £872 in January.The cheapest return price found within the last 5 days was £488 on Multiple Airlines (12 Jan–20 Jan).
Weekly flight availability from Chicago O'Hare Intl Airport to London Heathrow Airport
Explore weekly flight availability from O'Hare Intl to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 9 November 2026.
The most flights from ORD to LHR are scheduled on a Friday (45 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).
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.
What’s the top stopover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Share of one-stop return flights from Chicago O'Hare Intl Airport to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Dublin (DUB) – chosen by Cheapflights users on 58% of one-stop itineraries from Chicago O'Hare Intl Airport to London Heathrow Airport on Cheapflights.
What’s the cheapest stopover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Average return fare for one-stop flights from Chicago O'Hare Intl Airport to London Heathrow Airport, 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 O'Hare Intl Airport to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Chicago O'Hare Intl Airport to London Heathrow Airport, 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 O'Hare Intl Airport to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from Chicago O'Hare Intl Airport to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 56m.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 9 November 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Aer Lingus,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's 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 O'Hare Intl to Heathrow. 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 O'Hare Intl Airport to London Heathrow Airport?
Departing from Chicago O'Hare Intl Airport to London Heathrow Airport will take you 8h 10m. Chicago O'Hare Intl Airport and London Heathrow Airport are separated by a distance of 3939 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?
Currently priced at £369, Icelandair will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and United Airlines - these airlines can fly you to your destination from £473 and £511, respectively. Icelandair is currently priced 47% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to London Heathrow Airport one-way?
The cheapest airline one-way is Iberia, with whom users have recently found tickets for as low as £288. However, be on the lookout for offers from Lufthansa and British Airways, as they are both options that can get you from Chicago O'Hare Intl Airport to London Heathrow Airport for a low price.
What are the most reliable airlines from Chicago O'Hare Intl Airport to London Heathrow Airport?
The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to London Heathrow Airport are Royal Jordanian (88%), Air Canada (84%) and Austrian Airlines (84%).
What are the cheapest flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
The cheapest flight price from Chicago O'Hare Intl Airport to London Heathrow Airport is £231. On average you can expect to pay £733. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £407.
Can I find deals for business class flights from O'Hare Intl to Heathrow?
Yes. Cheapflights offers flight deals from O'Hare Intl to Heathrow 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 O'Hare Intl Airport to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £508). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £1,032). 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 Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 9 November 2026.
Top 7 airlines flying from O'Hare Intl to Heathrow
Discover the top 7 airlines that operate flights from O'Hare Intl to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 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 O'Hare Intl to Heathrow?
Cheapflights helps you search for flights from O'Hare Intl to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Heathrow?
Cheapflights simply makes it quick and affordable to book flights from O'Hare Intl to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from O'Hare Intl to Heathrow with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from O'Hare Intl to Heathrow flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from O'Hare Intl to Heathrow become cheaper?
Of course! You can now track prices for flights from O'Hare Intl to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.
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