Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to London?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 58m.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and London?

Reykjavik (KEF) was the most common stop: 36% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to London?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 15m.

What is the cheapest airline that flies from Chicago O'Hare Intl to London?

WestJet and TAP AIR PORTUGAL are the most popular carriers operating from Chicago O'Hare Intl to London

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to London?

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

What airlines fly to London?

British Airways, Iberia and United Airlines are the top three most popular airlines that fly to London from Chicago O'Hare Intl Airport according to our data. British Airways is the first choice among our users, with 50% of people opting to fly with this airline when traveling to London. Keep in mind that there are 16 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

The number of operators available for flights from Chicago O'Hare Intl Airport to London is 16 as of September 2025.

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.

$230 Cheap Flights from Chicago O'Hare Intl Airport to London in 2025/26

Q: How many flights depart from Chicago O'Hare Intl Airport to London on average per week?

As of September 2025, 388 flights take off from Chicago O'Hare Intl Airport and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

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Find the cheapest flights from Chicago O'Hare Intl Airport to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

12:50 pm - 7:10 amORD-LHR

12h 20m1 stop

9:00 am - 6:39 pmLHR-ORD

15h 39m2 stops

$505Air Canada

Find Deal

Wed, Nov 5 - Tue, Nov 11

6:30 pm - 10:55 amORD-LGW

10h 25m1 stop

11:55 am - 5:20 pmLGW-ORD

11h 25m1 stop

$505Icelandair

Find Deal

Mon, Feb 2 - Sun, Feb 15

4:00 pm - 6:20 amORD-LHR

8h 20mnonstop

6:50 am - 12:05 pmLHR-ORD

11h 15m1 stop

$507United Airlines

Find Deal

Tue, Sep 30 - Tue, Oct 7

10:35 pm - 12:15 pmORD-LHR

7h 40mnonstop

2:25 pm - 5:00 pmLHR-ORD

8h 35mnonstop

$510Finnair

Find Deal

Tue, Sep 23 - Fri, Oct 3

7:10 pm - 9:05 amORD-LHR

7h 55mnonstop

1:10 pm - 3:55 pmLHR-ORD

8h 45mnonstop

$512British Airways

Find Deal

Tue, Oct 14 - Tue, Oct 21

4:00 pm - 6:20 amORD-LHR

8h 20mnonstop

9:30 am - 8:06 pmLHR-ORD

16h 36m1 stop

$517United Airlines

Find Deal

Wed, Sep 24 - Wed, Oct 1

8:40 pm - 10:30 amORD-LHR

7h 50mnonstop

2:25 pm - 5:00 pmLHR-ORD

8h 35mnonstop

$521Finnair

Find Deal

Mon, Oct 6 - Wed, Oct 15

5:40 pm - 7:20 amORD-LHR

7h 40mnonstop

9:45 am - 5:23 pmLHR-ORD

13h 38m1 stop

$529Iberia

Find Deal

Mon, Sep 22 - Tue, Sep 30

8:35 pm - 11:15 amORD-LHR

33h 40m1 stop

11:45 am - 11:56 pmLHR-ORD

18h 11m1 stop

$537British Airways

Find Deal

Sat, Nov 1 - Wed, Nov 26

4:45 pm - 2:35 pmORD-LCY

15h 50m1 stop

9:10 am - 2:30 pmLCY-ORD

35h 20m1 stop

$546Iberia

Find Deal

Sun, Dec 7 - Mon, Dec 15

Iberia flights from Chicago O'Hare Intl Airport to London

Our best Iberia deals on Chicago O'Hare Intl Airport to London flight tickets

Iberia

Sep 22

ORD5:40 pmChicago O'Hare Intl

7h 40m

LHR7:20 amLondon Heathrow

Oct 21

LHR12:15 pmLondon Heathrow

8h 25m

ORD2:40 pmChicago O'Hare Intl

$512

Find similar

Iberia

Sep 28

ORD8:40 pmChicago O'Hare Intl

7h 50m

LHR10:30 amLondon Heathrow

Oct 7

LHR9:45 amLondon Heathrow

12h 28m

1 stop

ORD4:13 pmChicago O'Hare Intl

$513

Find similar

Iberia

Sep 23

ORD10:35 pmChicago O'Hare Intl

7h 40m

LHR12:15 pmLondon Heathrow

Sep 30

LHR9:45 amLondon Heathrow

13h 38m

1 stop

ORD5:23 pmChicago O'Hare Intl

$528

Find similar

Air Canada flights from Chicago O'Hare Intl Airport to London

Our best Air Canada deals on Chicago O'Hare Intl Airport to London 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 22

ORD9:50 pmChicago O'Hare Intl

7h 55m

LHR11:45 amLondon Heathrow

Sep 30

LHR8:30 amLondon Heathrow

9h 00m

ORD11:30 amChicago 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

momondo Fare Finder

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

Wed 11/5

12:50 pm-7:10 am

1 stop12h 20m

London Heathrow

Tue 11/11

9:00 am-6:39 pm

2 stops15h 39m

$505

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 2/2

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Sun 2/15

11:55 am-5:20 pm

1 stop11h 25m

$505

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

Tue 9/23

10:35 pm-12:15 pm

Nonstop7h 40m

London Heathrow

Fri 10/3

2:25 pm-5:00 pm

Nonstop8h 35m

$510

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

Wed 9/24

4:00 pm-6:20 am

Nonstop8h 20m

London Heathrow

Wed 10/1

9:30 am-8:06 pm

1 stop16h 36m

$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

Mon 9/22

5:40 pm-7:20 am

Nonstop7h 40m

London Heathrow

Tue 9/30

9:45 am-5:23 pm

1 stop13h 38m

$529

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/1

8:35 pm-11:15 am

1 stop33h 40m

London Heathrow

Wed 11/26

11:45 am-11:56 pm

1 stop18h 11m

$537

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Sun 12/7

4:45 pm-2:35 pm

1 stop15h 50m

London City

Mon 12/15

9:10 am-2:30 pm

1 stop35h 20m

$546

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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 $647, 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 $652.

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 $762. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $908. 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 $663 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $827. 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 $793 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 $694 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 11% 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 September 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 19% 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	$438
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 $438. The best round-trip flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is $642.

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?
The number of operators available for flights from Chicago O'Hare Intl Airport to London is 16 as of September 2025.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago O'Hare Intl Airport to London is Boeing 787-9 Dreamliner (40.62% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (19.41%), Boeing 777 (16.58%), and Boeing 767-300 (14.74%).
What is the most popular airline from Chicago O'Hare Intl Airport to London?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and London, the leading airline is British Airways, making up 28% of the total bookings. Other popular airlines include Iberia with 22%, American Airlines with 12%, and United Airlines with 11%.

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
JetBlue	PriceFrom $51	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.6 1,737 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $338	Free Cancellation	Rating 7.4 1,486 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $345	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
TAP AIR PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.1 1,977 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $472	Free Cancellation	Rating 7.0 545 reviews	Search Icelandair flights
British Airways	PriceFrom $502	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights
Aer Lingus	PriceFrom $537	Free Cancellation	Rating 7.2 1,277 reviews	Search Aer Lingus flights
Finnair	PriceFrom $547	Free Cancellation	Rating 7.6 1,324 reviews	Search Finnair flights

SWISS Flights From Chicago O'Hare Intl Airport to London
The lowest priced SWISS flight from Chicago O'Hare Intl Airport to London from the last 72 hours was $257. Generally, SWISS has 21 flights on this route every week with an average price of $701. SWISS is rated 7.6/10 by our users.
Finnair Flights From Chicago O'Hare Intl Airport to London
The best Finnair deal for Chicago O'Hare Intl Airport to London flight tickets found on momondo in the last 72 hours was $547, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $765 round-trip. Finnair operates 33 flights out of Chicago O'Hare Intl Airport into London in an average week, so prices vary by time and availability. 1,324 Finnair reviews by users on momondo have scored the airline at 7.6/10.

Gatwick

Hounslow

Dover

Luton

Slough

Milton Keynes

Hayes

Guildford

Dartford

Crawley

Stansted

Chelmsford

Brentwood

Ilford

Folkestone

Colchester

Watford

Wembley

Richmond

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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Cheap flights from Chicago O'Hare Intl Airport to London from $230

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Iberia flights from Chicago O'Hare Intl Airport to London

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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?

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

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

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?

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 11% 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 September 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 19% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Chicago O'Hare Intl to London?

WestJet and TAP AIR PORTUGAL are the most popular carriers operating from Chicago O'Hare Intl to London

What airlines fly to London?

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and London?

Reykjavik (KEF) was the most common stop: 36% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to London?

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to London?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 58m.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to London?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 15m.

How many flights depart from Chicago O'Hare Intl Airport to London on average per day?

As of September 2025, 55 flights take off from Chicago O'Hare Intl Airport and land in London each day. The most common flight departure time for this route is 4:00PM, with 64% of daily flights taking off in the evening.

How many flights depart from Chicago O'Hare Intl Airport to London on average per week?

As of September 2025, 388 flights take off from Chicago O'Hare Intl Airport and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

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

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

Fastest flight time

Direct flights

Airports in London

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

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

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?

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

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

SWISS Flights From Chicago O'Hare Intl Airport to London

Finnair Flights From Chicago O'Hare Intl Airport to London

Traveling to a place near London?

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your London 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London