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Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £253

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 28/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
13 Jul — 20 Jul1
1 adult

Cheapflights Tip: The best prices from Chicago O'Hare Intl to London Heathrow are usually found in February or April, booked 55 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 8 July 2025.

Round-trip from

£467

One-way from

£253

Popular in

June

Cheapest in

February

Average price

£756

Good round-trip deal

£575 or less

Good one-way deal

£316 or less
British Airways
  • British Airways
  • 14/8-21/8
  • Nonstop
  • 16h 35m total
  • Chicago to London
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Icelandair
  • Icelandair
  • 28/11
  • 1 total stop
  • 10h 20m total
  • Chicago to London
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Highest demand for flights based on searches. 20% potential increase in price (£111 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to London Heathrow.
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Price to beat on a one-way flight from Chicago O'Hare Intl to London Heathrow.
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Find flight deals from O'Hare Intl to Heathrow

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 8 July 2025.

Thu 14/821:15ORD - LHR
Nonstop7h 50mBritish Airways
Thu 21/811:10LHR - ORD
Nonstop8h 45mBritish Airways
Deal found 7/7£467
Sun 3/809:00ORD - LHR
1 stop15h 45mDelta
Tue 19/806:15LHR - ORD
2 stops18h 09mDelta
Deal found 7/7£469
Fri 17/1021:25ORD - LHR
Nonstop8h 20mUnited Airlines
Sat 25/1008:30LHR - ORD
Nonstop9h 00mUnited Airlines
Deal found 7/7£469
Sat 8/1116:20ORD - LHR
1 stop34h 00mAustrian Airlines
Sun 16/1119:25LHR - ORD
1 stop24h 35mAustrian Airlines
Deal found 7/7£473
Fri 10/1009:55ORD - LHR
2 stops14h 35mAir Canada
Sun 26/1013:25LHR - ORD
2 stops23h 36mAir Canada
Deal found 7/7£474
Sat 2/819:25ORD - LHR
1 stop10h 30mIcelandair
Sun 17/821:25LHR - ORD
1 stop26h 50mIcelandair
Deal found 7/7£476
Fri 3/1007:06ORD - LHR
2 stops20h 29mMultiple Airlines
Sun 5/1008:45LHR - ORD
2 stops27h 26mMultiple Airlines
Deal found 7/7£477
Wed 5/1111:45ORD - LHR
1 stop12h 35mIberia
Wed 12/1112:35LHR - ORD
Nonstop8h 50mIberia
Deal found 7/7£477
Fri 26/919:05ORD - LHR
1 stop20h 40mSWISS
Sun 5/1008:55LHR - ORD
2 stops37h 00mSWISS
Deal found 7/7£491
Fri 25/718:00ORD - LHR
1 stop12h 45mTAP AIR PORTUGAL
Sat 30/808:00LHR - ORD
1 stop14h 30mTAP AIR PORTUGAL
Deal found 7/7£494

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 8 July 2025.
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

Thu 14/8

21:15-11:05

Nonstop7h 50m

London Heathrow

Thu 21/8

11:10-13:55

Nonstop8h 45m

£467

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 9/10

19:15-18:50

2 stops17h 35m

London Heathrow

Mon 13/10

07:05-16:10

2 stops39h 05m

£468

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 11/12

07:20-07:10

2 stops17h 50m

London Heathrow

Tue 30/12

13:25-19:30

1 stop12h 05m

£469

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 17/10

21:25-11:45

Nonstop8h 20m

London Heathrow

Sat 25/10

08:30-11:30

Nonstop9h 00m

£469

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 1/8

13:30-09:15

1 stop13h 45m

London Heathrow

Sun 17/8

12:55-21:53

1 stop14h 58m

£470

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 2/8

19:25-11:55

1 stop10h 30m

London Heathrow

Sun 17/8

21:25-18:15

1 stop26h 50m

£476

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 14/10

12:54-11:05

1 stop16h 11m

London Heathrow

Thu 23/10

14:25-17:00

Nonstop8h 35m

£477

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 16/10

12:55-21:40

2 stops26h 45m

London Heathrow

Mon 27/10

06:00-15:00

1 stop14h 00m

£478

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 22/8

07:05-18:20

2 stops29h 15m

London Heathrow

Wed 27/8

08:50-05:40

2 stops26h 50m

£482

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 26/9

19:05-21:45

1 stop20h 40m

London Heathrow

Sun 5/10

08:55-15:55

2 stops37h 00m

£491

Flights are sorted by cheapest return flights first.

Deals found on 8/7

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 27 June 2025.

The best time to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 55 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 £112). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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 8 July 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 14% on flights from Chicago O'Hare Intl Airport to London Heathrow Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Chicago O'Hare Intl Airport to London Heathrow Airport

Explore weekly flight availability from O'Hare Intl to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 8 July 2025.

The most flights from ORD to LHR are scheduled on a Monday (57 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (51 on average).

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 8 July 2025.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Delta, Austrian Airlines, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,963 reviews
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
806 reviews
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,650 reviews
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,844 reviews
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
JetBlue
7.3
Good
2,910 reviews
Delta
8.0
Very Good
7,963 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport round-trip?

    Currently priced at £467, 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. Search Cheapflights for deals from Scandinavian Airlines and Air Canada - these airlines can fly you to your destination from £468 and £469, respectively. British Airways is currently priced 20% 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 Icelandair, with whom users have recently found tickets for as low as £253. However, be on the lookout for offers from TAP AIR PORTUGAL and JetBlue, 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 Royal Jordanian (70%), Air Canada (67%) and Austrian Airlines (67%).

  • 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 £285. On average you can expect to pay £1,669. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £236.

  • 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 £112). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Folkestone
Southend-on-Sea
Watford
Winchester
Swindon
Maidstone

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

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 8 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£406Average£571FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£408Average£593FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£440Average£562FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest£456Average£692FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£458Average£636FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£478Average£796FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£506Average£750FlexibilityNo cancel feeOn-time71%
Search American 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?

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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