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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £237

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
31 Jul — 7 Aug1
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 49 days in advance, depart on a Monday or Sunday 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 July 2026.

Fri 11/1219:15
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 17/1206:40
LHR
-
ORD
2 stops16h 05m
Scandinavian Airlines
Deal found 1/7£653
Tue 22/916:25
ORD
-
LHR
Nonstop8h 20m
United Airlines
Tue 29/906:50
LHR
-
ORD
1 stop11h 10m
United Airlines
Deal found 1/7£655
Tue 29/919:05
ORD
-
LHR
Nonstop8h 00m
British Airways
Fri 23/1015:15
LHR
-
ORD
Nonstop9h 00m
British Airways
Deal found 1/7£657
Wed 23/913:29
ORD
-
LHR
1 stop10h 51m
Delta
Tue 29/908:40
LHR
-
ORD
1 stop11h 35m
Delta
Deal found 1/7£659
Thu 3/915:00
ORD
-
LHR
1 stop18h 40m
ITA Airways
Mon 7/910:30
LHR
-
ORD
1 stop32h 40m
ITA Airways
Deal found 1/7£661
Sun 16/818:00
ORD
-
LHR
1 stop12h 45m
TAP AIR PORTUGAL
Sat 22/806:00
LHR
-
ORD
1 stop16h 05m
TAP AIR PORTUGAL
Deal found 1/7£662
Wed 9/919:25
ORD
-
LHR
1 stop18h 55m
Multiple Airlines
Wed 16/915:15
LHR
-
ORD
Nonstop9h 00m
Multiple Airlines
Deal found 1/7£663
Thu 3/919:25
ORD
-
LHR
1 stop18h 55m
Icelandair
Tue 8/913:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Deal found 1/7£664
Sun 19/719:25
ORD
-
LHR
2 stops14h 35m
Multiple Airlines
Sat 19/906:00
LHR
-
ORD
1 stop12h 35m
Multiple Airlines
Deal found 1/7£665
Fri 28/818:00
ORD
-
LHR
1 stop18h 50m
TAP AIR PORTUGAL
Sat 12/906:00
LHR
-
ORD
1 stop16h 05m
TAP AIR PORTUGAL
Deal found 30/6£666
Sat 5/918:05
ORD
-
LHR
1 stop17h 40m
TAP AIR PORTUGAL
Sat 12/908:00
LHR
-
ORD
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 1/7£667

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 July 2026.

Round-trip from

£664

One-way from

£237

Popular in

June

Cheapest in

January

Average price

£772

Good round-trip deal

£671 or less

Good one-way deal

£282 or less
ITA Airways
  • ITA Airways
  • 3/9-7/9
  • 2 total stops
  • 51h 20m total
  • Chicago to London
Search Deals
Icelandair
  • Icelandair
  • 11/8
  • 1 total stop
  • 10h 30m total
  • Chicago to London
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£159 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
Search Deals

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 July 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

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 14/11

17:45-07:55

Nonstop8h 10m

London Heathrow

Wed 18/11

06:50-12:10

1 stop11h 20m

£678

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 7/11

15:45-05:55

Nonstop8h 10m

London Heathrow

Wed 11/11

11:10-18:25

1 stop13h 15m

£679

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 2/9

18:15-08:30

Nonstop8h 15m

London Heathrow

Tue 15/9

06:50-12:00

1 stop11h 10m

£696

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 20/9

21:30-11:55

Nonstop8h 25m

London Heathrow

Tue 29/9

06:50-12:00

1 stop11h 10m

£696

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 24/8

16:30-06:45

Nonstop8h 15m

London Heathrow

Sun 30/8

06:50-12:00

1 stop11h 10m

£734

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 20/8

16:30-06:45

Nonstop8h 15m

London Heathrow

Tue 25/8

06:50-12:00

1 stop11h 10m

£734

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 14/9

16:25-06:45

Nonstop8h 20m

London Heathrow

Sun 13/12

07:30-15:20

1 stop13h 50m

£742

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/8

18:45-09:00

Nonstop8h 15m

London Heathrow

Tue 11/8

07:30-11:00

1 stop33h 30m

£744
Fastest return journey

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 2/9

16:30-06:45

Nonstop8h 15m

London Heathrow

Sun 13/9

11:05-14:10

Nonstop9h 05m

£756

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 2/12

18:30-17:50

2 stops17h 20m

London Heathrow

Mon 7/12

19:30-12:10

2 stops22h 40m

£845

Flights are sorted by cheapest return flights first.

Deals found on 30/6

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.
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?

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 48 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 £481). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £1,043). 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 July 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?

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 July 2026.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as United Airlines,Aer Lingus, andIcelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
United Airlines
7.4
Good
9,910 reviews
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Aer Lingus
7.3
Good
1,634 reviews
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Icelandair
7.0
Good
694 reviews
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Iberia
7.0
Good
3,248 reviews
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
British Airways
6.7
Okay
8,089 reviews
United Airlines
7.4
Good
9,910 reviews
Check prices

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!

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. All flights are typically direct.

  • 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 Aer Lingus - these airlines can fly you to your destination from £418 and £465, respectively. Icelandair is currently priced 40% 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 £167. 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 Air Canada (72%), Austrian Airlines (72%) and United Airlines (72%).

  • 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 £234. On average you can expect to pay £571. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £443.

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £481). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £1,043). 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
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Watford
Kingston upon Thames
Swindon
Eastbourne
Poole
Southall
Aylesbury
Romford

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.
O'Hare Intl to Gatwick flights
O'Hare Intl to Stansted flights
O'Hare Intl to London City flights
Midway to Heathrow flights
O'Hare Intl to Luton flights

Top 5 airlines flying from O'Hare Intl to Heathrow

Discover the top 5 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 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£369Average£494FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£418Average£562FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£465Average£790FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£515Average£705FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£526Average£673FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

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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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