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Cheap flights from Chicago O'Hare Intl Airport to London from $217

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 2/6. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to London

Cheap round-trip flights

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
$367Scandinavian Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9
Scandinavian Airlines Logo
7:20 pm - 4:25 pmORD-LHR
15h 05m2 stops
Scandinavian Airlines Logo
10:20 am - 4:45 pmLHR-ORD
12h 25m1 stop
$370Scandinavian Airlines
Find Deal
Fri, Nov 7 - Sun, Nov 9
Icelandair Logo
10:15 pm - 8:20 pmORD-LHR
16h 05m1 stop
Icelandair Logo
9:25 pm - 6:15 pmLHR-ORD
26h 50m1 stop
$473Icelandair
Find Deal
Sun, Sep 28 - Sun, Oct 5
Icelandair Logo
6:30 pm - 10:50 amORD-LHR
10h 20m1 stop
Icelandair Logo
8:35 pm - 5:20 pmLHR-ORD
26h 45m1 stop
$475Icelandair
Find Deal
Thu, Nov 6 - Tue, Nov 11
United Airlines Logo
2:20 pm - 11:35 amORD-LHR
15h 15m1 stop
United Airlines Logo
6:50 am - 12:05 pmLHR-ORD
11h 15m1 stop
$484United Airlines
Find Deal
Sun, Aug 24 - Tue, Sep 2
British Airways Logo
10:35 pm - 12:15 pmORD-LHR
7h 40mnonstop
British Airways Logo
6:20 am - 3:45 pmLHR-ORD
15h 25m1 stop
$486British Airways
Find Deal
Tue, Aug 26 - Tue, Sep 2
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
$487United Airlines
Find Deal
Wed, Sep 3 - Tue, Sep 9
American Airlines Logo
7:10 pm - 9:05 amORD-LHR
7h 55mnonstop
American Airlines Logo
8:20 am - 3:45 pmLHR-ORD
13h 25m1 stop
$492American Airlines
Find Deal
Tue, Sep 9 - Thu, Sep 18
British Airways Logo
4:55 pm - 6:50 amORD-LHR
7h 55mnonstop
British Airways Logo
6:10 am - 1:30 pmLHR-ORD
13h 20m1 stop
$494British Airways
Find Deal
Tue, Oct 14 - Tue, Oct 21
American Airlines Logo
3:17 pm - 7:50 amORD-LHR
10h 33m1 stop
American Airlines Logo
8:50 am - 3:45 pmLHR-ORD
12h 55m1 stop
$497American Airlines
Find Deal
Sun, Aug 24 - Tue, Sep 2

United Airlines flights from Chicago O'Hare Intl Airport to London Heathrow Airport

Our best United Airlines deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
United Airlines
Aug 20
ORD9:45 pmChicago O'Hare Intl
8h 00m
LHR11:45 amLondon Heathrow
Aug 27
LHR6:55 amLondon Heathrow
13h 05m
1 stop
ORD2:00 pmChicago O'Hare Intl
$472
Find similar
United Airlines
Aug 20
ORD2:32 pmChicago O'Hare Intl
10h 23m
1 stop
LHR6:55 amLondon Heathrow
Aug 27
LHR6:50 amLondon Heathrow
11h 05m
1 stop
ORD11:55 amChicago O'Hare Intl
$480
Find similar
United Airlines
Aug 24
ORD2:20 pmChicago O'Hare Intl
15h 15m
1 stop
LHR11:35 amLondon Heathrow
Sep 2
LHR6:50 amLondon Heathrow
11h 15m
1 stop
ORD12:05 pmChicago O'Hare Intl
$484
Find similar

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

Our best Icelandair deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Icelandair
Sep 28
ORD10:15 pmChicago O'Hare Intl
16h 05m
1 stop
LHR8:20 pmLondon Heathrow
Oct 5
LHR9:25 pmLondon Heathrow
26h 50m
1 stop
ORD6:15 pmChicago O'Hare Intl
$473
Find similar
Icelandair
Nov 6
ORD6:30 pmChicago O'Hare Intl
10h 20m
1 stop
LHR10:50 amLondon Heathrow
Nov 11
LHR8:35 pmLondon Heathrow
26h 45m
1 stop
ORD5:20 pmChicago O'Hare Intl
$475
Find similar
Icelandair
Oct 21
ORD7:25 pmChicago O'Hare Intl
10h 30m
1 stop
LHR11:55 amLondon Heathrow
Nov 12
LHR8:35 pmLondon Heathrow
26h 45m
1 stop
ORD5:20 pmChicago O'Hare Intl
$479
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 14, 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 11/7

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Sun 11/9

6:40 am-4:45 pm

2 stops16h 05m

$367

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 11/7

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Sun 11/9

10:20 am-4:45 pm

1 stop12h 25m

$370

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/28

10:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Sun 10/5

9:25 pm-6:15 pm

1 stop26h 50m

$473

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 11/6

6:30 pm-10:50 am

1 stop10h 20m

London Heathrow

Tue 11/11

8:35 pm-5:20 pm

1 stop26h 45m

$475

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/24

2:20 pm-11:35 am

1 stop15h 15m

London Heathrow

Tue 9/2

6:50 am-12:05 pm

1 stop11h 15m

$484

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/26

10:35 pm-12:15 pm

Nonstop7h 40m

London Heathrow

Tue 9/2

6:20 am-3:45 pm

1 stop15h 25m

$486

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/3

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Tue 9/9

6:50 am-12:05 pm

1 stop11h 15m

$487

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 9/9

7:10 pm-9:05 am

Nonstop7h 55m

London Heathrow

Thu 9/18

8:20 am-3:45 pm

1 stop13h 25m

$492

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 10/14

4:55 pm-6:50 am

Nonstop7h 55m

London Heathrow

Tue 10/21

6:10 am-1:30 pm

1 stop13h 20m

$494

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 8/24

3:17 pm-7:50 am

1 stop10h 33m

London Heathrow

Tue 9/2

8:50 am-3:45 pm

1 stop12h 55m

$497

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 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 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 O'Hare Intl Airport, with most prices found around $672. If you’re not able to fly to London Heathrow Airport in February, then April is your next best option. Flight prices from Chicago O'Hare Intl Airport to London Heathrow Airport during April average around $676.

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 $757. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $895.

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 O'Hare Intl Airport to London Heathrow Airport in the morning for as low as $678. 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 $823.

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 $794 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 O'Hare Intl Airport for as low as $700 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 23% 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 August 2025, prices for Chicago O'Hare Intl Airport to London Heathrow Airport flights are approximately 33% cheaper 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 round-trip 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

$217

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 $217. The best round-trip flight deal from Chicago O'Hare Intl Airport to London Heathrow Airport found on momondo in the last 72 hours is $367.
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?

    London Heathrow is 3939.2 mi away from Chicago O'Hare Intl. By plane, this route typically takes 7h 40m.

  • 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 refresh daily.

  • 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
JetBluePriceFrom $51Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.5
1,699 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,468 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
8.0
7,980 reviews
Search Delta flights
LufthansaPriceFrom $400Free CancellationRating
6.8
7,317 reviews
Search Lufthansa flights
IcelandairPriceFrom $468Free CancellationRating
7.0
526 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $508Free CancellationRating
7.1
1,948 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $548Free CancellationRating
7.1
1,214 reviews
Search Aer Lingus flights
FinnairPriceFrom $562Free CancellationRating
7.6
1,321 reviews
Search Finnair flights
British AirwaysPriceFrom $576Free CancellationRating
6.6
7,266 reviews
Search British Airways flights

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

    Alaska Airlines operates around 40 flights from Chicago O'Hare Intl Airport to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $920, but momondo users have found Alaska Airlines deals from Chicago O'Hare Intl Airport to London Heathrow Airport from as low as $809 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.

  • Finnair 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 Finnair (7.6/10, 1,321 ratings). Finnair flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 34 times per week, with deals starting from $562 round-trip and rising to an average price of around $760.

Traveling to a place near London?

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

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?

All flight searches from Chicago to London on momondo can be filtered to show those which offer flexible booking policies.

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?

Price alerts on flights to London from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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