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Cheap flights from Chicago to London from $230

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 to London departing on 10/25. 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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Cheap round-trip flights

Multiple Airlines Logo
11:15 am - 7:10 amORD-LHR
13h 55m2 stops
Multiple Airlines Logo
9:00 am - 6:51 pmLHR-ORD
15h 51m2 stops
$505Multiple Airlines
Find Deal
Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
12:50 pm - 7:10 amORD-LHR
12h 20m1 stop
Multiple Airlines Logo
9:00 am - 6:52 pmLHR-ORD
15h 52m2 stops
$506Multiple Airlines
Find Deal
Mon, Dec 1 - Tue, Dec 9
United Airlines Logo
4:00 pm - 6:20 amORD-LHR
8h 20mnonstop
United Airlines Logo
6:50 am - 12:05 pmLHR-ORD
11h 15m1 stop
$507United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
10:40 am - 6:30 amORD-LHR
13h 50m1 stop
Air Canada Logo
6:50 am - 2:48 pmLHR-ORD
13h 58m2 stops
$508Air Canada
Find Deal
Sun, Sep 28 - Tue, Oct 7
Air Canada Logo
7:11 am - 6:30 amORD-LHR
17h 19m1 stop
Air Canada Logo
6:50 am - 2:48 pmLHR-ORD
13h 58m2 stops
$509Air Canada
Find Deal
Sun, Sep 28 - Tue, Oct 7
British Airways Logo
7:10 pm - 9:05 amORD-LHR
7h 55mnonstop
British Airways Logo
1:10 pm - 3:55 pmLHR-ORD
8h 45mnonstop
$512British Airways
Find Deal
Tue, Oct 14 - Tue, Oct 21
United Airlines Logo
9:25 pm - 11:45 amORD-LHR
8h 20mnonstop
United Airlines Logo
2:10 pm - 5:20 pmLHR-ORD
9h 10mnonstop
$517United Airlines
Find Deal
Sun, Sep 28 - Tue, Oct 7
Finnair Logo
8:40 pm - 10:30 amORD-LHR
7h 50mnonstop
Finnair Logo
2:25 pm - 5:00 pmLHR-ORD
8h 35mnonstop
$521Finnair
Find Deal
Mon, Oct 6 - Wed, Oct 15
British Airways Logo
8:35 pm - 11:15 amORD-LHR
33h 40m1 stop
British Airways Logo
3:05 pm - 9:15 pmLHR-ORD
12h 10m1 stop
$537British Airways
Find Deal
Sat, Nov 1 - Tue, Nov 25
American Airlines Logo
5:10 pm - 6:55 amORD-LHR
7h 45mnonstop
American Airlines Logo
8:25 am - 5:00 pmLHR-ORD
13h 35m1 stop
$546American Airlines
Find Deal
Thu, Mar 5 - Thu, Mar 12

Air Canada flights from Chicago to London Heathrow Airport

Our best Air Canada deals on Chicago to London Heathrow Airport flight tickets
Air Canada
Sep 22
ORD9:50 pmChicago O'Hare Intl
7h 55m
LHR11:45 amLondon Heathrow
Sep 30
LHR9:30 amLondon Heathrow
11h 25m
1 stop
ORD2:55 pmChicago O'Hare Intl
$505
Find similar
Air Canada
Sep 28
ORD10:40 amChicago O'Hare Intl
13h 50m
1 stop
LHR6:30 amLondon Heathrow
Oct 7
LHR6:50 amLondon Heathrow
13h 58m
2 stops
ORD2:48 pmChicago O'Hare Intl
$508
Find similar
Air Canada
Sep 28
ORD7:11 amChicago O'Hare Intl
17h 19m
1 stop
LHR6:30 amLondon Heathrow
Oct 7
LHR6:50 amLondon Heathrow
13h 58m
2 stops
ORD2:48 pmChicago O'Hare Intl
$509
Find similar

Austrian Airlines flights from Chicago to London Heathrow Airport

Our best Austrian Airlines deals on Chicago to London Heathrow Airport flight tickets
Austrian Airlines
Sep 29
ORD4:20 pmChicago O'Hare Intl
16h 00m
1 stop
LHR2:20 pmLondon Heathrow
Oct 21
LHR6:00 amLondon Heathrow
13h 20m
1 stop
ORD1:20 pmChicago O'Hare Intl
$511
Find similar
Austrian Airlines
Dec 5
ORD4:20 pmChicago O'Hare Intl
15h 45m
1 stop
LHR2:05 pmLondon Heathrow
Dec 7
LHR7:40 amLondon Heathrow
9h 20m
ORD11:00 amChicago O'Hare Intl
$535
Find similar
Austrian Airlines
Feb 4
ORD1:00 pmChicago O'Hare Intl
37h 20m
2 stops
LHR8:20 amLondon Heathrow
Feb 18
LHR6:00 amLondon Heathrow
14h 00m
1 stop
ORD2:00 pmChicago O'Hare Intl
$540
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Chicago 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

Wed 1/28

11:15 am-7:10 am

2 stops13h 55m

London Heathrow

Wed 2/4

9:00 am-6:51 pm

2 stops15h 51m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/1

12:50 pm-7:10 am

1 stop12h 20m

London Heathrow

Tue 12/9

9:00 am-6:52 pm

2 stops15h 52m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 9/30

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Tue 10/7

6:50 am-12:05 pm

1 stop11h 15m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

10:40 am-6:30 am

1 stop13h 50m

London Heathrow

Tue 10/7

6:50 am-2:48 pm

2 stops13h 58m

$508

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

7:11 am-6:30 am

1 stop17h 19m

London Heathrow

Tue 10/7

6:50 am-2:48 pm

2 stops13h 58m

$509

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 10/14

7:10 pm-9:05 am

Nonstop7h 55m

London Heathrow

Tue 10/21

1:10 pm-3:55 pm

Nonstop8h 45m

$512

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

9:25 pm-11:45 am

Nonstop8h 20m

London Heathrow

Tue 10/7

2:10 pm-5:20 pm

Nonstop9h 10m

$517

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 10/6

8:40 pm-10:30 am

Nonstop7h 50m

London Heathrow

Wed 10/15

2:25 pm-5:00 pm

Nonstop8h 35m

$521

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/1

8:35 pm-11:15 am

1 stop33h 40m

London Heathrow

Tue 11/25

3:05 pm-9:15 pm

1 stop12h 10m

$537

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 3/5

5:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

Thu 3/12

8:25 am-5:00 pm

1 stop13h 35m

$546

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Chicago 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 and London Heathrow Airport?

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

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $666. If you’re not able to fly to London Heathrow Airport in November, then April is your next best option. Flight prices from Chicago to London Heathrow Airport during April average around $669.

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

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $762. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $908.

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 in the morning. momondo users have found flights departing from Chicago to London Heathrow Airport in the morning for as low as $663. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $827.

What is the cheapest Chicago to London Heathrow flight route?

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $793 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago for as low as $694 on momondo.

What cabin class options are available on Chicago to London Heathrow flights?

There are 4 cabin classes available to choose from on Chicago 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 to London Heathrow Airport flights?

You could potentially save up to 11% on your flight if you consider stops on a Chicago to London Heathrow Airport flight.

How have Chicago to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Chicago to London Heathrow Airport flights are approximately 1% more expensive when compared to flights at the same time last year.

When to book flights from Chicago to London Heathrow Airport

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

Cheap Chicago to London Heathrow Airport (CHI to LHR) flight deals and tips

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

Best Price Found

$438

Fastest flight time

7h 40m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Chicago in the past 72 hours is $438. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $642.
The fastest flight from Chicago to London Heathrow Airport takes 7h 40m
Direct flights go from Chicago to London Heathrow Airport every day.
Search flight deals

  • How far is Chicago to London Heathrow by plane?

    There are 3933.5 mi between Chicago and London Heathrow. A reasonable flight in good conditions will take 7h 45m.

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

    Prices for flights from Chicago to London Heathrow Airport refresh daily.

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

  • How old do you have to be to fly from Chicago to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 to London Heathrow Airport?

  • What is the most popular airline from Chicago to London Heathrow Airport?

Best airlines flying from Chicago to London Heathrow Airport

Compare and see reviews for airlines that fly from Chicago to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $51Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.6
1,737 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,957 reviews
Search Delta flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.1
1,975 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $472Free CancellationRating
7.0
544 reviews
Search Icelandair flights
Aer LingusPriceFrom $537Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights
FinnairPriceFrom $547Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
British AirwaysPriceFrom $564Free CancellationRating
6.7
7,363 reviews
Search British Airways flights

  • SWISS Flights From Chicago to London Heathrow Airport

    SWISS operates around 21 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $626, but momondo users have found SWISS deals from Chicago to London Heathrow Airport from as low as $257 round-trip. SWISS has been scored 7.6/10 in 1,737 reviews.

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair (7.6/10 from 1,324 reviews) operates around 33 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $765, with deals from around $547 rare but found on momondo. Referenced prices are for round-trip Chicago to London Heathrow Airport flight searches in the last 72 hours.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Colchester
Swindon
Stratford-upon-Avon
Watford

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Chicago.

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

Flights from Chicago to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to London.

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

If you are not ready to book a flight from Chicago to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Heathrow Airport trip

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