Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £274

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
31 Jan — 7 Feb1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in April or February, booked 25 days in advance, depart on a Sunday or Monday and return on a Wednesday

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 1 January 2026.

Wed 31/1213:24ORD - LHR
1 stop11h 16mMultiple Airlines
Tue 27/111:10LHR - ORD
1 stop13h 15mMultiple Airlines
Deal found 29/12£427
Wed 31/1217:55ORD - LHR
1 stop21h 25mBrussels Airlines
Tue 27/106:50LHR - ORD
1 stop11h 20mBrussels Airlines
Deal found 31/12£429
Wed 31/1213:24ORD - LHR
1 stop11h 16mMultiple Airlines
Fri 23/106:50LHR - ORD
1 stop11h 20mMultiple Airlines
Deal found 30/12£435
Wed 31/1218:50ORD - LHR
1 stop18h 25mSWISS
Tue 27/106:00LHR - ORD
1 stop12h 45mSWISS
Deal found 30/12£436
Wed 31/1213:24ORD - LHR
1 stop11h 16mMultiple Airlines
Thu 22/106:00LHR - ORD
1 stop12h 45mMultiple Airlines
Deal found 30/12£438
Tue 30/1218:50ORD - LHR
1 stop15h 30mMultiple Airlines
Fri 23/106:50LHR - ORD
1 stop11h 20mMultiple Airlines
Deal found 30/12£447
Tue 30/1218:50ORD - LHR
1 stop15h 30mSWISS
Tue 20/106:00LHR - ORD
1 stop12h 45mSWISS
Deal found 30/12£450
Wed 31/1221:05ORD - LHR
Nonstop8h 10mUnited Airlines
Wed 21/106:35LHR - ORD
1 stop13h 35mUnited Airlines
Deal found 30/12£458
Wed 31/1212:50ORD - LHR
1 stop12h 20mUnited Airlines
Tue 20/109:00LHR - ORD
1 stop13h 20mUnited Airlines
Deal found 30/12£461
Wed 31/1214:01ORD - LHR
1 stop13h 19mAir Canada
Thu 22/109:00LHR - ORD
2 stops16h 45mAir Canada
Deal found 30/12£463
Wed 31/1215:35ORD - LHR
1 stop9h 35mAir Canada
Fri 9/113:25LHR - ORD
1 stop12h 45mAir Canada
Deal found 30/12£464

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 1 January 2026.

Round-trip from

£398

One-way from

£274

Popular in

June

Cheapest in

April

Average price

£538

Good round-trip deal

£870 or less

Good one-way deal

£296 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 24/4-27/4
  • 3 total stops
  • 47h 50m total
  • Chicago to London
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 3/4
  • 1 total stop
  • 12h 45m total
  • Chicago to London
Highest demand for flights based on searches. 19% potential increase in price (£109 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).
Average for round-trip flights in January 2026
Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.

Cheapflights Fare Finder

 
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 858,174 searches. Data last updated 1 January 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

O'Hare Intl

Fly to

Heathrow

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 23/1

19:20-16:25

2 stops15h 05m

London Heathrow

Tue 27/1

19:50-16:45

2 stops26h 55m

£441

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/2

15:45-05:55

Nonstop8h 10m

London Heathrow

Thu 26/2

06:50-12:10

1 stop11h 20m

£462

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/3

15:45-05:55

Nonstop8h 10m

London Heathrow

Fri 13/3

06:35-15:10

1 stop13h 35m

£462

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/2

15:45-05:55

Nonstop8h 10m

London Heathrow

Wed 25/2

06:50-12:10

1 stop11h 20m

£462

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 2/3

17:50-07:55

Nonstop8h 05m

London Heathrow

Mon 9/3

12:05-17:20

1 stop34h 15m

£463

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 25/1

15:45-05:55

Nonstop8h 10m

London Heathrow

Mon 2/2

12:05-16:20

1 stop34h 15m

£463

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 8/4

17:40-07:20

Nonstop7h 40m

London Heathrow

Wed 15/4

10:20-17:50

1 stop13h 30m

£474

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 6/4

18:10-08:30

Nonstop8h 20m

London Heathrow

Mon 20/4

08:40-12:35

1 stop33h 55m

£475

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 31/3

18:40-09:00

Nonstop8h 20m

London Heathrow

Thu 16/4

10:50-18:15

1 stop13h 25m

£475

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 10/3

10:40-09:20

2 stops17h 40m

London Heathrow

Fri 13/3

07:05-17:55

2 stops15h 50m

£477

Flights are sorted by cheapest return flights first.

Deals found on 30/12

Showing 1-10 of 22 results
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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 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

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 return flight from O'Hare Intl to Heathrow. Price data was last updated on 26 December 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 25 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £297). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £676). 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 1 January 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.

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 1 January 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Finnair, United Airlines, andAer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Overall

7.6

Boarding

7.6

Entertainment

6.9

Crew

8.1

Comfort

7.4

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 £357, Lufthansa will fly you from Chicago O'Hare Intl Airport to London Heathrow Airport and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Finnair - these airlines can fly you to your destination from £385 and £413, respectively. Lufthansa is currently priced 39% 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 TAP AIR PORTUGAL, with whom users have recently found tickets for as low as £164. However, be on the lookout for offers from United Airlines 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 Aer Lingus (65%), Finnair (65%) and Air Canada (64%).

  • 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 £296. On average you can expect to pay £602. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £313.

  • 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 holiday 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 £297). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £676). 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
Milton Keynes
Croydon
Luton
Slough
Northampton
Hounslow
Gatwick
Ilford
Wembley
Hayes
Brentford
Colchester
Watford
Crawley
Swindon
Bedford
Chelmsford
Romford
Eastbourne
Ipswich

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for O'Hare Intl to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

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 858,174 searches. Data last updated 1 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£357Average£514FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£385Average£611FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£413Average£574FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£422Average£585FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IberiaCheapest£445Average£527FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Aer LingusCheapest£448Average£578FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£461Average£662FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from O'Hare Intl to Heathrow?

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Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Heathrow?

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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?

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