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Cheap flights from Chicago to London from $235

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 11/4. 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

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Scandinavian Airlines Logo
7:30 am - 9:20 amORD-LHR
19h 50m2 stops
Scandinavian Airlines Logo
6:40 am - 5:45 pmLHR-ORD
16h 05m1 stop
$532Scandinavian Airlines
Find Deal
Thu, Feb 26 - Thu, Mar 12
Scandinavian Airlines Logo
10:40 am - 4:00 pmORD-LHR
23h 20m2 stops
Scandinavian Airlines Logo
7:05 am - 4:45 pmLHR-ORD
15h 40m2 stops
$536Scandinavian Airlines
Find Deal
Thu, Jan 29 - Fri, Feb 6
Scandinavian Airlines Logo
7:10 am - 9:20 amORD-LHR
20h 10m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pmLHR-ORD
16h 05m1 stop
$537Scandinavian Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Icelandair Logo
6:30 pm - 7:30 pmORD-LHR
19h 00m1 stop
Icelandair Logo
12:15 pm - 5:20 pmLHR-ORD
11h 05m1 stop
$538Icelandair
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Wed, Dec 31 - Thu, Jan 15
Scandinavian Airlines Logo
7:20 pm - 4:25 pmORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
6:40 am - 4:45 pmLHR-ORD
16h 05m2 stops
$539Scandinavian Airlines
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Fri, Dec 5 - Sun, Dec 7
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
Icelandair Logo
8:35 pm - 5:20 pmLHR-ORD
26h 45m1 stop
$555Icelandair
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Sun, Dec 7 - Tue, Dec 23
British Airways Logo
8:40 pm - 10:25 amORD-LHR
7h 45mnonstop
British Airways Logo
3:45 pm - 6:45 pmLHR-ORD
9h 00mnonstop
$580British Airways
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Wed, Nov 12 - Tue, Nov 18
Finnair Logo
5:10 pm - 6:55 amORD-LHR
7h 45mnonstop
Finnair Logo
11:00 am - 1:50 pmLHR-ORD
8h 50mnonstop
$582Finnair
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Wed, Dec 31 - Wed, Jan 14
Iberia Logo
3:08 pm - 7:00 amORD-LHR
9h 52m1 stop
Iberia Logo
12:35 pm - 3:25 pmLHR-ORD
8h 50mnonstop
$585Iberia
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Wed, Nov 5 - Tue, Nov 11
British Airways Logo
9:45 pm - 11:35 amORD-LHR
7h 50mnonstop
British Airways Logo
11:00 am - 1:50 pmLHR-ORD
8h 50mnonstop
$586British Airways
Find Deal
Mon, Nov 17 - Thu, Dec 4

Finnair flights from Chicago to London Heathrow Airport

Our best Finnair deals on Chicago to London Heathrow Airport flight tickets
Finnair
Dec 31
ORD5:10 pmChicago O'Hare Intl
7h 45m
LHR6:55 amLondon Heathrow
Jan 14
LHR11:00 amLondon Heathrow
8h 50m
ORD1:50 pmChicago O'Hare Intl
$582
Find similar
Finnair
Oct 27
ORD1:26 pmChicago O'Hare Intl
14h 09m
1 stop
LHR8:35 amLondon Heathrow
Nov 12
LHR2:10 pmLondon Heathrow
8h 50m
ORD5:00 pmChicago O'Hare Intl
$590
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Air France flights from Chicago to London Heathrow Airport

Our best Air France deals on Chicago to London Heathrow Airport flight tickets
Air France
Oct 26
MDW1:48 pmChicago Midway
12h 17m
1 stop
LHR7:05 amLondon Heathrow
Nov 4
LHR8:55 amLondon Heathrow
19h 19m
1 stop
MDW10:14 pmChicago Midway
$612
Find similar
Air France
Mar 2
MDW2:00 pmChicago Midway
11h 05m
1 stop
LHR7:05 amLondon Heathrow
Mar 11
LHR11:05 amLondon Heathrow
12h 03m
1 stop
MDW6:08 pmChicago Midway
$638
Find similar
Air France
Jan 7
MDW2:00 pmChicago Midway
11h 05m
1 stop
LHR7:05 amLondon Heathrow
Apr 23
LHR12:25 pmLondon Heathrow
11h 40m
1 stop
MDW6:05 pmChicago Midway
$654
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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 October 22, 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

Thu 2/26

7:30 am-9:20 am

2 stops19h 50m

London Heathrow

Thu 3/12

6:40 am-5:45 pm

1 stop16h 05m

$532

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/29

10:40 am-4:00 pm

2 stops23h 20m

London Heathrow

Fri 2/6

7:05 am-4:45 pm

2 stops15h 40m

$536

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 12/8

7:10 am-9:20 am

2 stops20h 10m

London Heathrow

Mon 12/15

6:40 am-4:45 pm

1 stop16h 05m

$537

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 12/31

6:30 pm-7:30 pm

1 stop19h 00m

London Heathrow

Thu 1/15

12:15 pm-5:20 pm

1 stop11h 05m

$538

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 12/5

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Sun 12/7

6:40 am-4:45 pm

2 stops16h 05m

$539

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 12/7

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Tue 12/23

8:35 pm-5:20 pm

1 stop26h 45m

$555

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/12

8:40 pm-10:25 am

Nonstop7h 45m

London Heathrow

Tue 11/18

3:45 pm-6:45 pm

Nonstop9h 00m

$580

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 12/31

5:10 pm-6:55 am

Nonstop7h 45m

London Heathrow

Wed 1/14

11:00 am-1:50 pm

Nonstop8h 50m

$582

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 11/5

3:08 pm-7:00 am

1 stop9h 52m

London Heathrow

Tue 11/11

12:35 pm-3:25 pm

Nonstop8h 50m

$585

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 11/17

9:45 pm-11:35 am

Nonstop7h 50m

London Heathrow

Thu 12/4

11:00 am-1:50 pm

Nonstop8h 50m

$586

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 January 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 January, then February is your next best option. Flight prices from Chicago to London Heathrow Airport during February average around $671.

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 $769. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $920.

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 $659. 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 $833.

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 $795 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 2% 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 October 2025, prices for Chicago to London Heathrow Airport flights are approximately 49% 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

$449

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 $449. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $691.
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
2,908 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.5
1,772 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,535 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,979 reviews
Search Delta flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,507 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.1
2,027 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $479Free CancellationRating
7.0
560 reviews
Search Icelandair flights
Alaska AirlinesPriceFrom $487Free CancellationRating
8.0
11,151 reviews
Search Alaska Airlines flights
Aer LingusPriceFrom $502Free CancellationRating
7.2
1,350 reviews
Search Aer Lingus flights
FinnairPriceFrom $543Free CancellationRating
7.6
1,333 reviews
Search Finnair flights

  • Alaska Airlines Flights From Chicago to London Heathrow Airport

    Alaska Airlines operates around 22 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $677, but momondo users have found Alaska Airlines deals from Chicago to London Heathrow Airport from as low as $487 round-trip. Alaska Airlines has been scored 8.0/10 in 11,151 reviews.

  • Finnair Flights From Chicago to London Heathrow Airport

    Finnair (7.6/10 from 1,333 reviews) operates around 17 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $791, with deals from around $543 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
Milton Keynes
Luton
Dover
Slough
Guildford
Hayes
Dartford
Crawley
Stratford-upon-Avon
Brentwood
Salisbury
Chelmsford
Colchester
Folkestone
Romford
Swindon
Cobham
Wembley

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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