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Cheap flights from Chicago O'Hare Intl Airport to London from $227

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 10/18. 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

Icelandair Logo
7:25 pm - 11:55 amORD-LHR
10h 30m1 stop
Icelandair Logo
9:25 pm - 9:15 pmLHR-ORD
29h 50m1 stop
$503Icelandair
Find Deal
Fri, Sep 19 - Tue, Sep 30
Icelandair Logo
7:25 pm - 11:45 amORD-LGW
10h 20m1 stop
Icelandair Logo
3:40 pm - 6:15 pmLGW-ORD
32h 35m1 stop
$503Icelandair
Find Deal
Wed, Sep 3 - Fri, Sep 12
Scandinavian Airlines Logo
7:20 pm - 4:00 pmORD-LHR
14h 40m1 stop
Scandinavian Airlines Logo
3:35 pm - 4:45 pmLHR-ORD
31h 10m2 stops
$505Scandinavian Airlines
Find Deal
Sun, Nov 23 - Tue, Dec 2
Iberia Logo
4:30 pm - 10:55 amORD-LGW
12h 25m1 stop
Iberia Logo
10:40 am - 7:35 pmLGW-ORD
14h 55m1 stop
$506Iberia
Find Deal
Mon, Sep 29 - Tue, Oct 7
Scandinavian Airlines Logo
7:15 pm - 4:00 pmORD-LHR
14h 45m1 stop
Scandinavian Airlines Logo
6:40 pm - 4:45 pmLHR-ORD
28h 05m1 stop
$507Scandinavian Airlines
Find Deal
Mon, Oct 20 - Tue, Nov 4
British Airways Logo
6:55 pm - 12:30 pmORD-LHR
11h 35m1 stop
British Airways Logo
8:55 am - 5:52 pmLHR-ORD
14h 57m1 stop
$516British Airways
Find Deal
Wed, Sep 10 - Wed, Oct 8
British Airways Logo
7:00 pm - 6:35 amORD-LGW
29h 35m1 stop
British Airways Logo
8:40 pm - 2:15 pmLGW-ORD
23h 35m1 stop
$517British Airways
Find Deal
Tue, Oct 14 - Tue, Oct 21
Iberia Logo
1:59 pm - 7:45 amORD-LHR
11h 46m1 stop
Iberia Logo
6:45 pm - 2:15 pmLHR-ORD
25h 30m1 stop
$518Iberia
Find Deal
Wed, Sep 10 - Wed, Sep 24
Finnair Logo
8:40 pm - 10:30 amORD-LHR
7h 50mnonstop
Finnair Logo
8:20 am - 7:15 pmLHR-ORD
16h 55m1 stop
$526Finnair
Find Deal
Sun, Sep 7 - Tue, Sep 16
Finnair Logo
10:35 pm - 12:15 pmORD-LHR
7h 40mnonstop
Finnair Logo
10:30 am - 7:40 pmLHR-ORD
15h 10m1 stop
$527Finnair
Find Deal
Sun, Sep 21 - Tue, Oct 7

British Airways flights from Chicago O'Hare Intl Airport to London

Our best British Airways deals on Chicago O'Hare Intl Airport to London flight tickets
British Airways
Sep 10
ORD6:55 pmChicago O'Hare Intl
11h 35m
1 stop
LHR12:30 pmLondon Heathrow
Oct 8
LHR8:55 amLondon Heathrow
14h 57m
1 stop
ORD5:52 pmChicago O'Hare Intl
$516
Find similar
British Airways
Aug 26
ORD4:55 pmChicago O'Hare Intl
7h 55m
LHR6:50 amLondon Heathrow
Sep 23
LHR12:15 pmLondon Heathrow
8h 35m
ORD2:50 pmChicago O'Hare Intl
$517
Find similar
British Airways
Sep 3
ORD10:35 pmChicago O'Hare Intl
7h 40m
LHR12:15 pmLondon Heathrow
Sep 10
LHR1:10 pmLondon Heathrow
8h 45m
ORD3:55 pmChicago O'Hare Intl
$518
Find similar

Finnair flights from Chicago O'Hare Intl Airport to London

Our best Finnair deals on Chicago O'Hare Intl Airport to London flight tickets
Finnair
Sep 1
ORD4:55 pmChicago O'Hare Intl
7h 55m
LHR6:50 amLondon Heathrow
Sep 17
LHR12:15 pmLondon Heathrow
8h 35m
ORD2:50 pmChicago O'Hare Intl
$524
Find similar
Finnair
Sep 7
ORD8:40 pmChicago O'Hare Intl
7h 50m
LHR10:30 amLondon Heathrow
Sep 16
LHR8:20 amLondon Heathrow
16h 55m
1 stop
ORD7:15 pmChicago O'Hare Intl
$526
Find similar
Finnair
Sep 21
ORD10:35 pmChicago O'Hare Intl
7h 40m
LHR12:15 pmLondon Heathrow
Oct 7
LHR10:30 amLondon Heathrow
15h 10m
1 stop
ORD7:40 pmChicago O'Hare Intl
$527
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to London 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 21, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 9/19

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Tue 9/30

9:25 pm-9:15 pm

1 stop29h 50m

$503

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 9/3

7:25 pm-11:45 am

1 stop10h 20m

London Gatwick

Fri 9/12

3:40 pm-6:15 pm

1 stop32h 35m

$503

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 11/23

7:20 pm-4:00 pm

1 stop14h 40m

London Heathrow

Tue 12/2

3:35 pm-4:45 pm

2 stops31h 10m

$505

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 9/29

4:30 pm-10:55 am

1 stop12h 25m

London Gatwick

Tue 10/7

10:40 am-7:35 pm

1 stop14h 55m

$506

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 10/20

7:15 pm-4:00 pm

1 stop14h 45m

London Heathrow

Tue 11/4

6:40 pm-4:45 pm

1 stop28h 05m

$507

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/10

6:55 pm-12:30 pm

1 stop11h 35m

London Heathrow

Wed 10/8

8:55 am-5:52 pm

1 stop14h 57m

$516

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 10/14

7:00 pm-6:35 am

1 stop29h 35m

London Gatwick

Tue 10/21

8:40 pm-2:15 pm

1 stop23h 35m

$517

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/10

1:59 pm-7:45 am

1 stop11h 46m

London Heathrow

Wed 9/24

6:45 pm-2:15 pm

1 stop25h 30m

$518

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/7

8:40 pm-10:30 am

Nonstop7h 50m

London Heathrow

Tue 9/16

8:20 am-7:15 pm

1 stop16h 55m

$526

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 9/21

10:35 pm-12:15 pm

Nonstop7h 40m

London Heathrow

Tue 10/7

10:30 am-7:40 pm

1 stop15h 10m

$527

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

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?

The cheapest month to fly to London from Chicago O'Hare Intl Airport is in April. Flight prices, which tend to average around $650, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around $651.

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

The cheapest day to depart from Chicago O'Hare Intl Airport to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $760. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $901. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Chicago O'Hare Intl Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as $676 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $826. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to London from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London 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 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 flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl to London 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 flights?

You could potentially save up to 46% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London flight.

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

As of August 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 18% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to London 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 (ORD to LON) flight deals and tips

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

Best Price Found

$388

Fastest flight time

7h 40m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Chicago O'Hare Intl Airport in the past 72 hours is $388. The best round-trip flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is $572.
The fastest flight from Chicago O'Hare Intl Airport to London takes 7h 40m
Direct flights go from Chicago O'Hare Intl Airport to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

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

    The straight-line distance from Chicago O'Hare Intl to London is 3950.9 mi. 7h 40m is a normal flight duration for this route.

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

    Prices for flights from Chicago O'Hare Intl Airport to London refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to London.

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

    The travel and health documents you'll need for your trip to London 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. 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?

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

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

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $51Free CancellationRating
7.2
2,916 reviews
Search JetBlue flights
SWISSPriceFrom $257Free CancellationRating
7.6
1,702 reviews
Search SWISS flights
Scandinavian AirlinesPriceFrom $338Free CancellationRating
7.4
1,471 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $345Free CancellationRating
7.9
7,981 reviews
Search Delta flights
LufthansaPriceFrom $400Free CancellationRating
6.8
7,344 reviews
Search Lufthansa flights
IcelandairPriceFrom $469Free CancellationRating
7.0
529 reviews
Search Icelandair flights
British AirwaysPriceFrom $502Free CancellationRating
6.7
7,291 reviews
Search British Airways flights
TAP AIR PORTUGALPriceFrom $508Free CancellationRating
7.1
1,959 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $553Free CancellationRating
7.1
1,228 reviews
Search Aer Lingus flights
FinnairPriceFrom $568Free CancellationRating
7.6
1,320 reviews
Search Finnair flights

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

    The lowest priced Alaska Airlines flight from Chicago O'Hare Intl Airport to London from the last 72 hours was $809. Generally, Alaska Airlines has 40 flights on this route every week with an average price of $920. Alaska Airlines is rated 8.0/10 by our users.

  • SWISS Flights From Chicago O'Hare Intl Airport to London

    The best SWISS deal for Chicago O'Hare Intl Airport to London flight tickets found on momondo in the last 72 hours was $257, round-trip. It should be noted that an average SWISS flight deal for this route in this time was higher, at $723 round-trip. SWISS operates 21 flights out of Chicago O'Hare Intl Airport into London in an average week, so prices vary by time and availability. 1,702 SWISS reviews by users on momondo have scored the airline at 7.6/10.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Luton
Dover
Slough
Milton Keynes
Guildford
Dartford
Crawley
Hayes
Chelmsford
Stansted
Brentwood
Ilford
Folkestone
Colchester
Watford
Richmond
Canterbury
Croydon

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to London. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to London from Chicago which offer a flexible booking policy as well as other useful filters and features.

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?

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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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport