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Cheap flights from Chicago to London from $229

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 10/6. 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

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
$505United Airlines
Find Deal
Sun, Sep 28 - Wed, Oct 15
United Airlines Logo
9:50 pm - 11:45 amORD-LHR
7h 55mnonstop
United Airlines Logo
6:50 am - 12:05 pmLHR-ORD
11h 15m1 stop
$506United Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 22
Logo
12:50 pm - 7:10 amORD-LHR
12h 20m1 stop
Logo
6:50 am - 2:55 pmLHR-ORD
14h 05m2 stops
$507
Find Deal
Wed, Nov 12 - Wed, Nov 19
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$522Icelandair
Find Deal
Thu, Feb 19 - Fri, Feb 27
Icelandair Logo
7:25 pm - 8:20 pmORD-LHR
18h 55m1 stop
Icelandair Logo
1:05 pm - 6:15 pmLHR-ORD
11h 10m1 stop
$523Icelandair
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Fri, Oct 3 - Thu, Oct 16
Lufthansa Logo
4:00 pm - 6:20 amORD-LHR
8h 20mnonstop
Lufthansa Logo
8:30 am - 11:30 amLHR-ORD
9h 00mnonstop
$527Lufthansa
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Thu, Oct 16 - Wed, Oct 22
Lufthansa Logo
9:25 pm - 11:45 amORD-LHR
8h 20mnonstop
Lufthansa Logo
2:10 pm - 5:20 pmLHR-ORD
9h 10mnonstop
$528Lufthansa
Find Deal
Mon, Sep 29 - Tue, Oct 7
British Airways Logo
5:10 pm - 6:55 amORD-LHR
7h 45mnonstop
British Airways Logo
1:10 pm - 3:55 pmLHR-ORD
8h 45mnonstop
$533British Airways
Find Deal
Tue, Dec 30 - Wed, May 13
Scandinavian Airlines Logo
10:30 am - 4:00 pmORD-LHR
23h 30m2 stops
Scandinavian Airlines Logo
7:05 am - 4:45 pmLHR-ORD
15h 40m2 stops
$537Scandinavian Airlines
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Tue, Nov 18 - Mon, Nov 24
Scandinavian Airlines Logo
10:31 am - 5:40 pmORD-LHR
25h 09m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pmLHR-ORD
16h 05m2 stops
$538Scandinavian Airlines
Find Deal
Tue, Dec 2 - Sun, Dec 7

Austrian Airlines flights from Chicago to London Heathrow Airport

Our best Austrian Airlines deals on Chicago to London Heathrow Airport flight tickets
Austrian Airlines
Oct 6
ORD9:25 pmChicago O'Hare Intl
8h 20m
LHR11:45 amLondon Heathrow
Oct 21
LHR6:00 amLondon Heathrow
13h 20m
1 stop
ORD1:20 pmChicago O'Hare Intl
$521
Find similar
Austrian Airlines
Sep 21
ORD4:20 pmChicago O'Hare Intl
16h 00m
1 stop
LHR2:20 pmLondon Heathrow
Sep 29
LHR9:05 amLondon Heathrow
34h 15m
1 stop
ORD1:20 pmChicago O'Hare Intl
$535
Find similar
Austrian Airlines
Nov 5
ORD1:00 pmChicago O'Hare Intl
19h 05m
2 stops
LHR2:05 pmLondon Heathrow
Nov 18
LHR2:50 pmLondon Heathrow
29h 10m
1 stop
ORD2:00 pmChicago O'Hare Intl
$540
Find similar

Delta flights from Chicago to London Heathrow Airport

Our best Delta deals on Chicago to London Heathrow Airport flight tickets
Delta
Nov 12
ORD1:25 pmChicago O'Hare Intl
10h 55m
1 stop
LHR6:20 amLondon Heathrow
Nov 20
LHR6:20 amLondon Heathrow
14h 50m
1 stop
ORD3:10 pmChicago O'Hare Intl
$513
Find similar
Delta
Oct 1
ORD6:28 pmChicago O'Hare Intl
11h 37m
1 stop
LHR12:05 pmLondon Heathrow
Nov 19
LHR8:55 amLondon Heathrow
12h 15m
1 stop
ORD3:10 pmChicago O'Hare Intl
$514
Find similar
Delta
Sep 24
ORD1:00 pmChicago O'Hare Intl
11h 25m
1 stop
LHR6:25 amLondon Heathrow
Oct 3
LHR6:30 amLondon Heathrow
13h 40m
1 stop
ORD2:10 pmChicago O'Hare Intl
$515
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 11, 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

Sun 9/28

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Wed 10/15

6:50 am-12:05 pm

1 stop11h 15m

$505

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/24

9:50 pm-11:45 am

Nonstop7h 55m

London Heathrow

Wed 10/22

6:50 am-12:05 pm

1 stop11h 15m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/12

12:50 pm-7:10 am

1 stop12h 20m

London Heathrow

Wed 11/19

6:50 am-2:55 pm

2 stops14h 05m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 2/19

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Fri 2/27

12:15 pm-5:20 pm

1 stop11h 05m

$522

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 10/3

7:25 pm-8:20 pm

1 stop18h 55m

London Heathrow

Thu 10/16

1:05 pm-6:15 pm

1 stop11h 10m

$523

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 10/16

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Wed 10/22

8:30 am-11:30 am

Nonstop9h 00m

$527

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 9/29

9:25 pm-11:45 am

Nonstop8h 20m

London Heathrow

Tue 10/7

2:10 pm-5:20 pm

Nonstop9h 10m

$528

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/30

5:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

Wed 5/13

1:10 pm-3:55 pm

Nonstop8h 45m

$533

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 11/18

10:30 am-4:00 pm

2 stops23h 30m

London Heathrow

Mon 11/24

7:05 am-4:45 pm

2 stops15h 40m

$537

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 12/2

10:31 am-5:40 pm

2 stops25h 09m

London Heathrow

Sun 12/7

6:40 am-4:45 pm

2 stops16h 05m

$538

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 cheapest month to fly to London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $671. If you’re not able to fly to London Heathrow Airport in February, then April is your next best option. Flight prices from Chicago to London Heathrow Airport during April average around $673.

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 $761. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $903.

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 $665. 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 $828.

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 $792 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 $696 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 22% 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 19% 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

$434

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 $434. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $639.
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
2,913 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.5
1,731 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,960 reviews
Search Delta flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
IcelandairPriceFrom $472Free CancellationRating
7.0
546 reviews
Search Icelandair flights
FinnairPriceFrom $554Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
TAP AIR PORTUGALPriceFrom $554Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $562Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $567Free CancellationRating
6.6
7,361 reviews
Search British Airways flights

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair operates around 34 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $759, but momondo users have found Finnair deals from Chicago to London Heathrow Airport from as low as $554 round-trip. Finnair has been scored 7.6/10 in 1,323 reviews.

  • SWISS Flights From Chicago to London Heathrow Airport

    SWISS (7.5/10 from 1,731 reviews) operates around 21 flights from Chicago to London Heathrow Airport in any given week. The average SWISS airfare for this route is around $626, with deals from around $257 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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