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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from C$ 431

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
5 Sep — 12 Sep1
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 October, booked 43 days in advance, depart on a Thursday or Saturday and return on a Thursday

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 6 August 2026.

Mon 9/117:15 p.m. -
1 stop32h 05m
Thu 12/116:40 a.m. -
2 stops40h 05m
Deal found 4/8C$ 965
Thu 12/117:15 p.m. -
2 stops37h 20m
Sun 15/119:55 a.m. -
2 stops36h 50m
Deal found 5/8C$ 969
Fri 4/127:15 p.m. -
2 stops31h 40m
Mon 7/126:40 a.m. -
1 stop16h 05m
Deal found 5/8C$ 980
Sat 26/97:15 p.m. -
1 stop17h 15m
Mon 28/96:40 a.m. -
2 stops15h 30m
Deal found 3/8C$ 986
Fri 6/117:15 p.m. -
2 stops31h 40m
Mon 9/116:40 a.m. -
1 stop16h 05m
Deal found 4/8C$ 987
Sat 10/107:15 p.m. -
2 stops15h 45m
Sun 11/107:50 p.m. -
2 stops26h 20m
Deal found 3/8C$ 992
Tue 15/97:15 p.m. -
1 stop32h 05m
Fri 18/96:40 a.m. -
2 stops15h 30m
Deal found 2/8C$ 1,006
Wed 11/117:15 p.m. -
2 stops35h 40m
Sat 14/1110:20 a.m. -
1 stop12h 25m
Deal found 5/8C$ 1,007
Fri 13/117:15 p.m. -
2 stops15h 10m
Sun 15/1110:35 a.m. -
2 stops36h 10m
Deal found 5/8C$ 1,011
Tue 1/127:15 p.m. -
2 stops32h 20m
Fri 4/126:40 a.m. -
2 stops16h 05m
Deal found 4/8C$ 1,013

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 6 August 2026.

Round-trip from

C$ 965

One-way from

C$ 431

Popular in

June

Cheapest in

January

Average price

C$ 1,192
Scandinavian Airlines
  • Scandinavian Airlines
  • 13/11-16/11
  • 3 total stops
  • 47h 45m total
  • Chicago to London
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Icelandair
  • Icelandair
  • 7/10
  • 1 total stop
  • 10h 30m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 559 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 94 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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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 6 August 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 Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Mon 21/9

7:15 p.m.-7:55 p.m.

2 stops18h 40m

London Heathrow

Tue 29/9

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

2 stops15h 30m

C$ 1,157

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Thu 22/10

7:15 p.m.-4:25 p.m.

2 stops15h 10m

London Heathrow

Wed 28/10

10:20 a.m.-5:45 p.m.

1 stop12h 25m

C$ 1,205

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Tue 3/11

2:03 p.m.-10:00 a.m.

1 stop13h 57m

London Heathrow

Fri 20/11

8:55 a.m.-4:15 p.m.

1 stop13h 20m

C$ 1,213

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Mon 21/9

12:47 p.m.-7:45 a.m.

1 stop12h 58m

London Heathrow

Tue 29/9

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

1 stop11h 10m

C$ 1,225

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Fri 16/10

7:15 p.m.-6:30 p.m.

2 stops17h 15m

London Heathrow

Sat 24/10

3:35 p.m.-5:45 p.m.

2 stops32h 10m

C$ 1,237

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Fri 11/12

3:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

Thu 17/12

6:35 a.m.-6:25 p.m.

1 stop17h 50m

C$ 1,267

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Thu 10/12

3:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

Wed 16/12

7:30 a.m.-3:20 p.m.

1 stop13h 50m

C$ 1,281

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Fri 13/11

3:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

Tue 17/11

7:40 a.m.-10:45 a.m.

Nonstop9h 05m

C$ 1,306

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Tue 17/11

3:45 p.m.-5:55 a.m.

Nonstop8h 10m

London Heathrow

Mon 30/11

11:10 a.m.-6:25 p.m.

1 stop13h 15m

C$ 1,323

ChicagoLondon

ORD Chicago O'Hare Intl - LHR London Heathrow

ORDLHR

Chicago O'Hare Intl

Sat 3/10

4:25 p.m.-6:45 a.m.

Nonstop8h 20m

London Heathrow

Sat 10/10

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

1 stop11h 10m

C$ 1,364

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

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?

Booking 42 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 897). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,937). 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 6 August 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?

Airfare is typical for this route at the moment.

Chicago O'Hare Intl Airport to London Heathrow Airport flights typically cost between C$ 965 and C$ 1,440 in November.
The cheapest round-trip price found within the last 5 days was C$ 965 on Scandinavian Airlines (9 Nov-12 Nov).

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$ 1,267, Scandinavian Airlines can have you in London Heathrow Airport from Chicago O'Hare Intl Airport in 8h 10m. 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 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 Air Canada (63%), Austrian Airlines (63%) and United Airlines (63%).

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of C$ 897). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of C$ 1,937). 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
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

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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.

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