Cheap flights from Chicago O'Hare Intl Airport to London Heathrow Airport from £175

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LHR
16 Nov — 23 Nov1
1 adult
1 adult, Economy

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 Thursday or Sunday and return on a Wednesday

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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 17 October 2025.

Tue 18/1118:30ORD - LHR
1 stop19h 00mIcelandair
Tue 2/1220:35LHR - ORD
1 stop26h 45mIcelandair
Deal found 16/10£392
Wed 31/1218:30ORD - LHR
1 stop19h 00mIcelandair
Thu 15/112:15LHR - ORD
1 stop11h 05mIcelandair
Deal found 15/10£393
Mon 3/1119:20ORD - LHR
2 stops39h 40mScandinavian Airlines
Thu 6/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Deal found 16/10£394
Fri 7/1119:20ORD - LHR
2 stops31h 35mScandinavian Airlines
Mon 10/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Deal found 16/10£398
Sun 9/1118:30ORD - LHR
1 stop10h 20mIcelandair
Tue 18/1112:15LHR - ORD
1 stop11h 05mIcelandair
Deal found 15/10£401
Tue 18/1110:35ORD - LHR
2 stops25h 05mScandinavian Airlines
Tue 2/1219:50LHR - ORD
2 stops26h 55mScandinavian Airlines
Deal found 16/10£402
Tue 11/1107:10ORD - LHR
2 stops20h 10mScandinavian Airlines
Mon 17/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Deal found 15/10£403
Fri 7/1119:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Sun 9/1106:40LHR - ORD
2 stops16h 05mScandinavian Airlines
Deal found 16/10£404
Tue 11/1107:10ORD - LHR
2 stops20h 10mScandinavian Airlines
Thu 20/1107:05LHR - ORD
2 stops15h 40mScandinavian Airlines
Deal found 15/10£405
Tue 11/1107:10ORD - LHR
2 stops20h 10mScandinavian Airlines
Tue 25/1119:50LHR - ORD
2 stops26h 55mScandinavian Airlines
Deal found 17/10£406

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 17 October 2025.

Round-trip from

£392

One-way from

£175

Popular in

June

Cheapest in

February

Average price

£517

Good round-trip deal

£423 or less

Good one-way deal

£293 or less
Icelandair
  • Icelandair
  • 18/11-2/12
  • 2 total stops
  • 45h 45m total
  • Chicago to London
5/11
  • 5/11
  • 2 total stops
  • 38h 08m total
  • Chicago to London
Highest demand for flights based on searches. 20% potential increase in price (£112 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Average for round-trip flights in October 2025
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 17 October 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 29/1

10:40-16:00

2 stops23h 20m

London Heathrow

Fri 6/2

06:40-16:45

1 stop16h 05m

£395

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 26/2

10:40-09:20

2 stops16h 40m

London Heathrow

Mon 2/3

06:40-16:45

1 stop16h 05m

£395

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 18/11

10:35-17:40

2 stops25h 05m

London Heathrow

Mon 24/11

07:05-16:45

2 stops15h 40m

£405

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 26/2

10:40-09:20

2 stops16h 40m

London Heathrow

Sun 1/3

21:05-16:45

2 stops25h 40m

£408

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/10

13:22-08:35

1 stop14h 13m

London Heathrow

Wed 5/11

14:10-17:00

Nonstop8h 50m

£439

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

13:14-06:25

1 stop11h 11m

London Heathrow

Wed 10/12

06:20-18:02

2 stops17h 42m

£440

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 25/11

08:50-07:05

1 stop16h 15m

London Heathrow

Wed 3/12

06:20-18:02

2 stops17h 42m

£440

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 29/10

10:25-06:50

1 stop15h 25m

London Heathrow

Tue 4/11

06:30-16:50

2 stops16h 20m

£442

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/1

05:50-09:00

1 stop21h 10m

London Heathrow

Thu 15/1

06:20-17:37

2 stops17h 17m

£447

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 3/12

17:50-07:55

Nonstop8h 05m

London Heathrow

Tue 9/12

06:35-14:10

1 stop13h 35m

£450

Flights are sorted by cheapest return flights first.

Deals found on 17/10

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 10 October 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, May is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport (average of £291). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £670). 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 17 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from Chicago O'Hare Intl Airport to London Heathrow Airport by exploring options for tickets in the afternoon.

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 17 October 2025.
Read through reviews of airlines operating flights from Chicago O'Hare Intl Airport to London Heathrow Airport, such as Finnair, Aer Lingus, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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.

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Overall

7.6

Boarding

7.6

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 23h 20m. Chicago O'Hare Intl Airport and London Heathrow Airport are separated by a distance of 3939 mi.

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

    Currently priced at £358, 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 £414, respectively. Lufthansa is currently priced 39% below the average price you’ll pay for this route.

  • 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 (80%), SriLankan Airlines (74%) and Gulf Air (74%).

  • 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 £283. On average you can expect to pay £397. The most popular route, (Chicago O'Hare Intl - London Heathrow), can usually be booked for £310.

  • 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 £291). Flying from Chicago O'Hare Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £670). 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
Slough
Gatwick
Hounslow
Northampton
Luton
Wembley
Deal
Ilford
Crawley
Hayes
Watford
Winchester
Swindon
Chichester
Romford
Ipswich
Brentford
Dartford

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 17 October 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£358Average£523FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£385Average£629FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£414Average£673FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£446Average£530FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£450Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£462Average£617FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£493Average£605FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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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.

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