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Cheap flights from Chicago O'Hare Intl Airport to London from £164

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to London departing on 6/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to London

Cheap return flights

Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
10:20 - 16:55LHR-ORD
12h 35m1 stop
£320Scandinavian Airlines
Find Deal
Fri, 16 Jan - Sun, 18 Jan
Scandinavian Airlines Logo
19:20 - 16:25ORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
10:20 - 16:55LHR-ORD
12h 35m1 stop
£321Scandinavian Airlines
Find Deal
Fri, 16 Jan - Sun, 18 Jan
Scandinavian Airlines Logo
19:20 - 18:30ORD-LHR
17h 10m2 stops
Scandinavian Airlines Logo
09:55 - 16:45LHR-ORD
36h 50m2 stops
£324Scandinavian Airlines
Find Deal
Fri, 16 Jan - Sun, 18 Jan
Lufthansa Logo
18:00 - 08:20ORD-LHR
8h 20mdirect
Lufthansa Logo
06:50 - 12:05LHR-ORD
11h 15m1 stop
£353Lufthansa
Find Deal
Tue, 23 Sep - Tue, 30 Sep
Aer Lingus Logo
15:45 - 09:05ORD-LHR
11h 20m1 stop
Aer Lingus Logo
08:50 - 14:00LHR-ORD
11h 10m1 stop
£354Aer Lingus
Find Deal
Sun, 10 Aug - Tue, 19 Aug
Aer Lingus Logo
15:45 - 08:00ORD-LHR
10h 15m1 stop
Aer Lingus Logo
13:25 - 19:00LHR-ORD
11h 35m1 stop
£356Aer Lingus
Find Deal
Sun, 10 Aug - Fri, 29 Aug
Lufthansa Logo
16:00 - 06:20ORD-LHR
8h 20mdirect
Lufthansa Logo
14:10 - 17:20LHR-ORD
9h 10mdirect
£360Lufthansa
Find Deal
Tue, 23 Sep - Tue, 30 Sep
British Airways Logo
17:40 - 07:20ORD-LHR
7h 40mdirect
British Airways Logo
08:20 - 15:45LHR-ORD
13h 25m1 stop
£364British Airways
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Wed, 3 Sep - Thu, 18 Sep
British Airways Logo
21:15 - 11:05ORD-LHR
7h 50mdirect
British Airways Logo
06:20 - 15:45LHR-ORD
15h 25m1 stop
£365British Airways
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Tue, 26 Aug - Tue, 2 Sep
Finnair Logo
20:35 - 10:30ORD-LHR
7h 55mdirect
Finnair Logo
10:20 - 17:50LHR-ORD
13h 30m1 stop
£367Finnair
Find Deal
Sun, 10 Aug - Thu, 28 Aug

Air Canada flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Our best Air Canada deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Air Canada
10 Aug
ORD10:40Chicago O'Hare Intl
17h 20m
1 stop
LHR10:00London Heathrow
28 Aug
LHR06:50London Heathrow
14h 05m
2 stops
ORD14:55Chicago O'Hare Intl
£360
Find similar
Air Canada
10 Aug
ORD14:07Chicago O'Hare Intl
10h 23m
1 stop
LHR06:30London Heathrow
19 Aug
LHR08:30London Heathrow
8h 55m
ORD11:25Chicago O'Hare Intl
£377
Find similar
Air Canada
10 Aug
ORD14:07Chicago O'Hare Intl
10h 23m
1 stop
LHR06:30London Heathrow
4 Sept
LHR06:50London Heathrow
14h 05m
2 stops
ORD14:55Chicago O'Hare Intl
£384
Find similar

Finnair flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Our best Finnair deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Finnair
10 Aug
ORD20:35Chicago O'Hare Intl
7h 55m
LHR10:30London Heathrow
28 Aug
LHR10:20London Heathrow
13h 30m
1 stop
ORD17:50Chicago O'Hare Intl
£367
Find similar
Finnair
10 Aug
ORD20:35Chicago O'Hare Intl
7h 55m
LHR10:30London Heathrow
19 Aug
LHR14:25London Heathrow
8h 35m
ORD17:00Chicago O'Hare Intl
£389
Find similar
Finnair
10 Aug
ORD20:35Chicago O'Hare Intl
7h 55m
LHR10:30London Heathrow
19 Aug
LHR14:25London Heathrow
8h 35m
ORD17:00Chicago O'Hare Intl
£390
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago O'Hare Intl Airport to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 31 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

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 16/1

19:20-16:25

2 stops15h 05m

London Heathrow

Sun 18/1

10:20-16:55

1 stop12h 35m

£320

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 16/1

19:20-16:25

2 stops15h 05m

London Heathrow

Sun 18/1

10:20-16:55

1 stop12h 35m

£321

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 16/1

19:20-18:30

2 stops17h 10m

London Heathrow

Sun 18/1

09:55-16:45

2 stops36h 50m

£324

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 23/9

18:00-08:20

Nonstop8h 20m

London Heathrow

Tue 30/9

06:50-12:05

1 stop11h 15m

£353

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/8

15:45-09:05

1 stop11h 20m

London Heathrow

Tue 19/8

08:50-14:00

1 stop11h 10m

£354

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/8

15:45-08:00

1 stop10h 15m

London Heathrow

Fri 29/8

13:25-19:00

1 stop11h 35m

£356

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 23/9

16:00-06:20

Nonstop8h 20m

London Heathrow

Tue 30/9

14:10-17:20

Nonstop9h 10m

£360

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 3/9

17:40-07:20

Nonstop7h 40m

London Heathrow

Thu 18/9

08:20-15:45

1 stop13h 25m

£364

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 26/8

21:15-11:05

Nonstop7h 50m

London Heathrow

Tue 2/9

06:20-15:45

1 stop15h 25m

£365

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/8

20:35-10:30

Nonstop7h 55m

London Heathrow

Thu 28/8

10:20-17:50

1 stop13h 30m

£367

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Chicago O'Hare Intl Airport and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

In general, February is the cheapest month to fly from Chicago O'Hare Intl Airport to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £505. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Chicago O'Hare Intl Airport averaging around £508.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Chicago O'Hare Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £540. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £668.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Chicago O'Hare Intl Airport to London Heathrow Airport at midday for as low as £579. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £646 on average. Flights to London Heathrow Airport from Chicago O'Hare Intl Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Chicago O'Hare Intl to London Heathrow flight route?

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago O'Hare Intl - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £597 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago O'Hare Intl Airport for as low as £531 on momondo.

What cabin class options are available on Chicago O'Hare Intl to London Heathrow flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago O'Hare Intl Airport to London Heathrow Airport flights?

You could potentially save up to 37% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London Heathrow Airport flight.

How have Chicago O'Hare Intl Airport to London Heathrow Airport flight prices changed over time?

As of July 2025, prices for Chicago O'Hare Intl Airport to London Heathrow Airport flights are approximately 6% more expensive when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Chicago O'Hare Intl Airport to London Heathrow Airport (ORD to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport

Best price found

£164

Fastest flight time

7h 40m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Chicago O'Hare Intl Airport in the past 72 hours is £164. The best return flight deal from Chicago O'Hare Intl Airport to London Heathrow Airport found on momondo in the last 72 hours is £320.
The fastest flight from Chicago O'Hare Intl Airport to London Heathrow Airport takes 7h 40m
Direct flights go from Chicago O'Hare Intl Airport to London Heathrow Airport every day.
Search flight deals

  • How far is Chicago O'Hare Intl to London Heathrow by plane?

    The distance between Chicago O'Hare Intl and London Heathrow is about 3939.2 mi. Typically, this will take 7h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

    Prices for flights from Chicago O'Hare Intl Airport to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to London Heathrow Airport?

  • What is the most popular airline from Chicago O'Hare Intl Airport to London Heathrow Airport?

Best airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom £415Free CancellationRating
7.1
1,192 reviews
Search Aer Lingus flights
FinnairPriceFrom £417Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
IberiaPriceFrom £450Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
British AirwaysPriceFrom £465Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
United AirlinesPriceFrom £466Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
LufthansaPriceFrom £489Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
American AirlinesPriceFrom £518Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Finnair Flights From Chicago O'Hare Intl Airport to London Heathrow Airport

    Finnair flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 34 times per week, with 1,316 momondo users rating the airline 7.6/10. The cheapest Finnair deal from Chicago O'Hare Intl Airport to London Heathrow Airport in the last 72 hours was £556 (round-trip), much lower than the average airfare cost of £808 for Finnair flights on this route.

  • United Airlines Flights From Chicago O'Hare Intl Airport to London Heathrow Airport

    Another popular option for Chicago O'Hare Intl Airport to London Heathrow Airport flights is United Airlines (7.4/10, 8,900 ratings). United Airlines flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 21 times per week, with deals starting from £621 round-trip and rising to an average price of around £942.

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Why use momondo?

Why should I use momondo to find a flight deal from Chicago to London?

It is quick and easy to find Chicago to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from Chicago to London with flexible booking policies on momondo?

Yes. All flights to London from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Chicago to London?

momondo helps you find the best flight between Chicago and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Chicago to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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