$299+ Cheap flights from O'Hare Intl (ORD) to Heathrow (LHR)
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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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Find cheap flights from O'Hare Intl to Heathrow with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in January or February, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Friday
Cheap flight deals from O'Hare Intl to Heathrow
Cheapest
Best
Last-minute
One-way
Cheapest flights from O'Hare Intl to HeathrowExplore 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 September 20, 2026.
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 September 20, 2026.
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 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 12/293:45 pm -
Nonstop8h 10m
Wed 1/137:40 am -
Nonstop9h 05m
Deal found 9/18![United Airlines logo]()
$735
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:45 am -
1 stop15h 45m
Tue 10/62:05 pm -
1 stop12h 07m
Deal found 9/20![United Airlines logo]()
$736
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 pm -
1 stop12h 05m
Wed 10/78:40 am -
2 stops17h 50m
Deal found 9/16![Delta logo]()
$738
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:05 pm -
Nonstop8h 00m
Tue 11/173:40 pm -
Nonstop9h 05m
Deal found 9/18![British Airways logo]()
$739
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:10 pm -
Nonstop7h 45m
Thu 11/1211:00 am -
Nonstop8h 45m
Deal found 9/16![British Airways logo]()
$740
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.
Tue 11/245:45 pm -
Nonstop8h 10m
Mon 11/301:45 pm -
1 stop32h 30m
Deal found 9/15![United Airlines logo]()
$741
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:15 pm -
1 stop10h 20m
Thu 1/281:00 pm -
1 stop12h 52m
Deal found 9/16![Air Canada logo]()
$742
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/109:00 pm -
1 stop10h 30m
Tue 10/201:25 pm -
1 stop11h 50m
Deal found 9/19![Aer Lingus logo]()
$743
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:00 pm -
Nonstop7h 50m
Fri 1/2911:00 am -
Nonstop8h 45m
Deal found 9/18![British Airways logo]()
$744
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.
Mon 9/2811:30 am -
1 stop12h 50m
Thu 1/2811:35 am -
1 stop14h 40m
Deal found 9/17![Delta logo]()
$745
Best flights from O'Hare Intl to HeathrowDiscover carefully curated flight deals from O'Hare Intl to Heathrow 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 O'Hare Intl to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 20, 2026.
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 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 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.
Wed 11/111:35 pm -
1 stop13h 50m
Mon 11/168:40 am -
2 stops16h 04m
Deal found 9/17![Delta logo]()
$788
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 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 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 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 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 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 11/197:05 am -
1 stop18h 05m
Mon 11/237:50 am -
Nonstop9h 05m
Deal found 9/18![United Airlines logo]()
$833
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.
Sat 1/165:45 pm -
Nonstop8h 10m
Sat 1/309:00 am -
1 stop13h 15m
Deal found 9/15![United Airlines logo]()
$859
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 1/33:45 pm -
Nonstop8h 10m
Sat 1/911:05 am -
1 stop31h 05m
Deal found 9/15![United Airlines logo]()
$966
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.
Thu 10/154:25 pm -
Nonstop8h 20m
Sun 10/2510:25 am -
Nonstop9h 20m
Deal found 9/17![United Airlines logo]()
$986
Last-minute flights from O'Hare Intl to HeathrowDiscover last-minute flight deals from O'Hare Intl to Heathrow. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from O'Hare Intl to Heathrow. Data last updated September 20, 2026 and is based on user searches.
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:45 am -
1 stop15h 45m
Tue 10/62:05 pm -
1 stop12h 07m
Deal found 9/20![United Airlines logo]()
$736
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/284:25 pm -
Nonstop8h 20m
Thu 1/2812:00 pm -
1 stop15h 30m
Deal found 9/16![United Airlines logo]()
$741
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.
Mon 9/2811:30 am -
1 stop12h 50m
Thu 1/2811:35 am -
1 stop14h 40m
Deal found 9/17![Delta 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 9/294:25 pm -
Nonstop8h 20m
Fri 1/297:40 am -
Nonstop9h 05m
Deal found 9/18![United Airlines logo]()
$735
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 pm -
1 stop12h 05m
Wed 10/78:40 am -
2 stops17h 50m
Deal found 9/16![Delta logo]()
$738
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:00 pm -
Nonstop7h 50m
Fri 1/293:40 pm -
Nonstop9h 05m
Deal found 9/16![British Airways logo]()
$740
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3011:05 am -
1 stop13h 25m
Tue 2/211:10 am -
1 stop12h 33m
Deal found 9/16![Air Canada logo]()
$742
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:00 pm -
Nonstop7h 50m
Tue 2/23:40 pm -
Nonstop9h 05m
Deal found 9/18![British Airways logo]()
$744
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:05 pm -
Nonstop8h 00m
Tue 11/173:40 pm -
Nonstop9h 05m
Deal found 9/18![British Airways logo]()
$739
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 Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/109:00 pm -
1 stop10h 30m
Tue 10/201:25 pm -
1 stop11h 50m
Deal found 9/19![Aer Lingus logo]()
$743
One-way flights from O'Hare Intl to HeathrowSearch for one-way flight options from O'Hare Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
Search for one-way flight options from O'Hare Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
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 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 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
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:30 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Icelandair logo]()
$302
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/116:30 pm -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Icelandair logo]()
$303
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:30 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Icelandair logo]()
$304
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 11/106:30 pm -
1 stop10h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Icelandair logo]()
$305
This lastminute.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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/304:25 pm -
1 stop10h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Virgin Atlantic logo]()
$308
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:30 pm -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Icelandair logo]()
$310
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.
Tue 10/277:30 pm -
2 stops17h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Multiple Airlines logo]()
$312
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:00 am -
1 stop20h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![JetBlue logo]()
$315
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 September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $734 (Cheapflightsfares) |
One-way from | $299 (Booking.com) |
Popular in | June |
Cheapest in | January |
Average price | $952 |
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 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 September 20, 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
Cheapest round-trip
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
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Mon 3/1
3:00 pm-10:50 am
2 stops13h 50m
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 12/23
8:30 pm-9:20 pm
1 stop18h 50m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$419
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Wed 10/21
1:23 pm-12:05 pm
2 stops16h 42m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$509
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Mon 9/28
9:30 pm-11:55 am
Nonstop8h 25m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$615
ChicagoLondon
ORD Chicago O'Hare Intl - LHR London Heathrow
ORDLHR
Chicago O'Hare Intl
Tue 11/17
9:50 pm-12:00 pm
Nonstop8h 10m
London Heathrow
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$615
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from O'Hare Intl to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from O'Hare Intl to Heathrow in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago O'Hare Intl Airport-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago O'Hare Intl Airport-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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 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 Chicago O'Hare Intl Airport to London Heathrow Airport
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How far ahead should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?
The price you pay for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 $644). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,375). 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 September 20, 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 often are flights from Chicago to London delayed?
About 24% of weekly flights between Chicago and London have experienced delays in the past year, with the average delay time being 164 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 last year, British Airways have had the lowest number of delays on this route, with just 23% of flights being delayed.
What’s the top layover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Share of 1-stop round-trip flights from Chicago O'Hare Intl Airport to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 50% of 1-stop itineraries from Chicago O'Hare Intl Airport to London Heathrow Airport on Cheapflights.
What’s the cheapest layover airport for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Average round-trip fare for 1-stop flights from Chicago O'Hare Intl Airport to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $526.
What’s the fastest layover option from Chicago O'Hare Intl Airport to London Heathrow Airport?
Shortest average travel time for 1-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 layover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 55m.
Which airport typically offers the quickest layover for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Average layover duration for 1-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 Lisbon (LIS) offer the fastest connection on this route, with an average layover time of 1h 35m.
The best insider tips for Chicago O'Hare Intl Airport to London Heathrow Airport flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to London Heathrow Airport trip
Our travel experts
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 September 20, 2026.
Read reviews from past customers who have flown United Airlines,American Airlines, andIberia from Chicago O'Hare Intl Airport to London Heathrow Airport. 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.
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Crew
8.1
Entertainment
7.1
Food
6.7
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
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.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
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Basingstoke
Watford
Northampton
Dartford
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Kingston upon Thames
Eastbourne
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Other flights to Heathrow
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O'Hare Intl and Heathrow flights
Browse other O'Hare Intl and Heathrow flight options. Last updated on September 20, 2026.
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Top 10 airlines flying from O'Hare Intl to Heathrow
Discover the top 10 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 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$432 | Average$726 | 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$482 | Average$623 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$522 | Average$809 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$565 | Average$926 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$581 | Average$917 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$595 | Average$953 | FlexibilityNo cancel fee | On-time70% |