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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 519

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
20 Apr — 27 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in January or April, booked 2 days in advance, depart on a Monday or Friday and return on a Friday

Cheap flight deals from O'Hare Intl to Heathrow

Enter your travel dates to find the best prices.

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 21 March 2026.

Sun 11/107:15 p.m.
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Sun 18/107:50 p.m.
LHR
-
ORD
2 stops26h 20m
Scandinavian Airlines
Deal found 17/3C$ 834
Sat 2/57:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 21/56:40 a.m.
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Deal found 18/3C$ 841
Sat 3/107:15 p.m.
ORD
-
LHR
2 stops18h 40m
Scandinavian Airlines
Sun 11/107:50 p.m.
LHR
-
ORD
2 stops26h 20m
Scandinavian Airlines
Deal found 18/3C$ 862
Sun 3/57:25 p.m.
ORD
-
LHR
1 stop10h 30m
Icelandair
Thu 7/51:05 p.m.
LHR
-
ORD
1 stop11h 10m
Icelandair
Deal found 16/3C$ 907
Mon 20/47:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 30/47:30 p.m.
LHR
-
ORD
1 stop26h 40m
Scandinavian Airlines
Deal found 18/3C$ 914
Wed 22/47:15 p.m.
ORD
-
LHR
2 stops15h 45m
Scandinavian Airlines
Thu 30/49:05 p.m.
LHR
-
ORD
2 stops25h 05m
Scandinavian Airlines
Deal found 17/3C$ 917
Tue 13/107:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Sat 17/106:40 a.m.
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Deal found 17/3C$ 925
Sun 4/107:15 p.m.
ORD
-
LHR
2 stops17h 35m
Scandinavian Airlines
Sat 10/105:30 p.m.
LHR
-
ORD
2 stops28h 40m
Scandinavian Airlines
Deal found 19/3C$ 951
Wed 30/97:15 p.m.
ORD
-
LHR
1 stop16h 25m
Scandinavian Airlines
Sun 4/105:00 p.m.
LHR
-
ORD
1 stop29h 10m
Scandinavian Airlines
Deal found 20/3C$ 952
Mon 21/97:15 p.m.
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Tue 6/106:40 a.m.
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Deal found 17/3C$ 958

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 21 March 2026.

Round-trip from

C$ 841

One-way from

C$ 519

Popular in

June

Cheapest in

January

Average price

C$ 1,050
Scandinavian Airlines
  • Scandinavian Airlines
  • 2/5-21/5
  • 2 total stops
  • 30h 15m total
  • Chicago to London
Search Deals
JetBlue
  • JetBlue
  • 13/5
  • 1 total stop
  • 14h 49m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 401 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 85 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 629,999 searches. Data last updated 21 March 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 round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/5

6:00 p.m.-10:00 p.m.

1 stop22h 00m

London Heathrow

Wed 10/6

7:50 p.m.-3:20 p.m.

1 stop25h 30m

C$ 959

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/5

10:25 p.m.-8:20 p.m.

1 stop15h 55m

London Heathrow

Wed 10/6

1:05 p.m.-6:15 p.m.

1 stop11h 10m

C$ 1,083

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 3/5

6:50 a.m.-9:20 a.m.

2 stops20h 30m

London Heathrow

Fri 15/5

6:40 a.m.-4:10 p.m.

2 stops15h 30m

C$ 1,084

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 4/5

9:15 p.m.-11:15 a.m.

Nonstop8h 00m

London Heathrow

Tue 12/5

7:30 a.m.-5:50 p.m.

1 stop16h 20m

C$ 1,106

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 16/4

1:06 p.m.-6:20 a.m.

1 stop11h 14m

London Heathrow

Tue 21/4

8:40 a.m.-6:13 p.m.

2 stops15h 33m

C$ 1,128
Quickest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/5

9:40 p.m.-11:55 a.m.

Nonstop8h 15m

London Heathrow

Wed 10/6

6:50 a.m.-12:00 p.m.

1 stop11h 10m

C$ 1,146

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/5

10:24 a.m.-6:45 a.m.

1 stop14h 21m

London Heathrow

Wed 17/6

9:55 a.m.-7:43 p.m.

2 stops15h 48m

C$ 1,165

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 15/5

2:00 p.m.-7:10 a.m.

1 stop11h 10m

London Heathrow

Fri 22/5

6:30 a.m.-2:15 p.m.

1 stop13h 45m

C$ 1,230

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 9/5

12:55 p.m.-10:40 a.m.

1 stop15h 45m

London Heathrow

Mon 25/5

5:50 p.m.-12:00 p.m.

1 stop24h 10m

C$ 1,235

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 9/5

6:10 p.m.-8:30 a.m.

Nonstop8h 20m

London Heathrow

Sun 17/5

6:50 a.m.-12:00 p.m.

1 stop11h 10m

C$ 1,243

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/3

Showing 1-10 of 22 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.
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

How far ahead should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Heathrow. Price data was last updated on 13 March 2026.

Booking 2 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Currently, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 537). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,217). 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 21 March 2026.

When flying from Chicago O'Hare Intl Airport to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to London Heathrow Airport?

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 21 March 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,805 reviews
Check prices

Food

6.4

Boarding

6.9

Comfort

6.8

Entertainment

6.4

Crew

7.6

Overall

6.7

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,805 reviews
British Airways
6.7
Okay
7,805 reviews
Check prices

Food

6.4

Boarding

6.9

Comfort

6.8

Entertainment

6.4

Crew

7.6

Overall

6.7

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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?

    For as low as C$ 1,083, TAP AIR PORTUGAL can have you in London Heathrow Airport from Chicago O'Hare Intl Airport in 15h 55m. The distance from Chicago O'Hare Intl Airport to London Heathrow Airport is about 6339 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?

    Currently priced at C$ 636, British Airways will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. British Airways is priced at 41% lower than the current average price of a flight leaving 3 months from now.

  • 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 Aer Lingus (80%), Air Canada (77%) and Austrian Airlines (77%).

  • Can I find deals for flights from O'Hare Intl to Heathrow that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Heathrow.

  • 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 537). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,217). 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Twickenham
Sutton
Gatwick
Slough
Marlow
Cobham
Leamington Spa
Romford
Watford
Bedford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from O'Hare Intl to Heathrow

Discover the top airline 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 629,999 searches. Data last updated 21 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 636AverageC$ 717FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

Deals for O'Hare Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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?

Certainly. Search results for flights to Heathrow from O'Hare Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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