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 16m.

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

Reykjavik (KEF) was the most common stop: 39% 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.

What is the most punctual flight time for Chicago to London flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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

British Airways, TAP AIR PORTUGAL, and Lufthansa are the most popular carriers operating from Chicago O'Hare Intl to London

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 57m.

How often are flights from Chicago to London delayed?

Historically, on average around 25% of flights between Chicago and London have experienced a delay on any given week. The average delay length over the past 12 months has been 168 minutes.

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 51% of people opting to fly with this airline when traveling to London. Keep in mind that there are 18 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Which airline has the best punctuality record on Chicago to London flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 23% of their flights experiencing any sort of delay.

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 18 as of December 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.

$377 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 December 2025, 315 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 14% of weekly flights taking off on this day.

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7:20 pm - 4:25 pm

ORD

LHR

15h 05m2 stops

6:05 pm - 4:45 pm

LHR

ORD

28h 40m2 stops

$545Scandinavian Airlines

Mon, Feb 23 - Tue, Mar 3

6:20 am - 10:05 am

ORD

LGW

21h 45m2 stops

2:00 pm - 5:52 pm

LGW

ORD

33h 52m1 stop

$545Multiple Airlines

Sat, Jan 17 - Fri, Jan 23

10:40 pm - 2:40 pm

ORD

LGW

10h 00m1 stop

1:00 pm - 6:15 pm

LGW

ORD

11h 15m1 stop

$546Icelandair

Sun, May 10 - Sat, May 16

6:30 pm - 7:30 pm

ORD

LHR

19h 00m1 stop

12:15 pm - 5:20 pm

LHR

ORD

11h 05m1 stop

$547Icelandair

Tue, Jan 6 - Wed, Jan 14

8:15 pm - 3:45 pm

ORD

LGW

13h 30m1 stop

4:35 pm - 2:45 pm

LGW

ORD

28h 10m1 stop

$550TAP AIR PORTUGAL

Fri, Jan 16 - Sat, Jan 24

8:15 pm - 10:40 pm

ORD

LHR

20h 25m1 stop

6:00 am - 3:25 pm

LHR

ORD

15h 25m1 stop

$553TAP AIR PORTUGAL

Fri, Jan 16 - Fri, Jan 23

4:25 pm - 9:30 am

ORD

LCY

11h 05m1 stop

9:20 am - 2:20 pm

LCY

ORD

11h 00m1 stop

$608Virgin Atlantic

Wed, Feb 4 - Wed, Feb 11

6:50 pm - 12:55 pm

ORD

LCY

12h 05m1 stop

9:20 am - 4:20 pm

LCY

ORD

13h 00m1 stop

$619SWISS

Wed, Jan 28 - Wed, Feb 4

6:50 pm - 5:05 pm

ORD

LCY

16h 15m1 stop

9:15 am - 4:20 pm

LCY

ORD

13h 05m1 stop

$624SWISS

Tue, Jan 20 - Tue, Jan 27

4:25 pm - 8:10 am

ORD

LCY

9h 45m1 stop

9:20 am - 2:20 pm

LCY

ORD

11h 00m1 stop

$634Virgin Atlantic

Wed, Feb 4 - Wed, Feb 11

Scandinavian Airlines flights from Chicago O'Hare Intl Airport to London

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

Scandinavian Airlines

Feb 23

ORD7:20 pmChicago O'Hare Intl

15h 05m

2 stops

LHR4:25 pmLondon Heathrow

Mar 3

LHR6:05 pmLondon Heathrow

28h 40m

2 stops

ORD4:45 pmChicago O'Hare Intl

$545

Find similar

Scandinavian Airlines

Mar 8

ORD8:20 pmChicago O'Hare Intl

17h 10m

1 stop

LHR6:30 pmLondon Heathrow

Mar 13

LHR6:40 amLondon Heathrow

16h 15m

1 stop

ORD5:55 pmChicago O'Hare Intl

$546

Find similar

Scandinavian Airlines

Mar 8

ORD8:20 pmChicago O'Hare Intl

15h 05m

2 stops

LHR4:25 pmLondon Heathrow

Mar 12

LHR7:05 amLondon Heathrow

15h 40m

2 stops

ORD5:45 pmChicago O'Hare Intl

$548

Find similar

TAP AIR PORTUGAL flights from Chicago O'Hare Intl Airport to London

Our best TAP AIR PORTUGAL deals on Chicago O'Hare Intl Airport to London flight tickets

TAP AIR PORTUGAL

Jan 16

ORD8:15 pmChicago O'Hare Intl

13h 30m

1 stop

LGW3:45 pmLondon Gatwick

Jan 20

LGW4:35 pmLondon Gatwick

28h 25m

1 stop

ORD3:00 pmChicago O'Hare Intl

$550

Find similar

TAP AIR PORTUGAL

Jan 16

ORD8:15 pmChicago O'Hare Intl

20h 25m

1 stop

LHR10:40 pmLondon Heathrow

Jan 23

LHR6:00 amLondon Heathrow

15h 25m

1 stop

ORD3:25 pmChicago O'Hare Intl

$553

Find similar

TAP AIR PORTUGAL

Apr 10

ORD6:00 pmChicago O'Hare Intl

15h 40m

1 stop

LGW3:40 pmLondon Gatwick

Apr 14

LGW4:25 pmLondon Gatwick

29h 35m

1 stop

ORD4:00 pmChicago O'Hare Intl

$566

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

Mon 2/23

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Tue 3/3

6:05 pm-4:45 pm

2 stops28h 40m

$545

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sat 1/17

6:20 am-10:05 am

2 stops21h 45m

London Gatwick

Fri 1/23

2:00 pm-5:52 pm

1 stop33h 52m

$545

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 5/10

10:40 pm-2:40 pm

1 stop10h 00m

London Gatwick

Sat 5/16

1:00 pm-6:15 pm

1 stop11h 15m

$546

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 1/6

6:30 pm-7:30 pm

1 stop19h 00m

London Heathrow

Wed 1/14

12:15 pm-5:20 pm

1 stop11h 05m

$547

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 1/16

8:15 pm-3:45 pm

1 stop13h 30m

London Gatwick

Sat 1/24

4:35 pm-2:45 pm

1 stop28h 10m

$550

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 1/16

8:15 pm-10:40 pm

1 stop20h 25m

London Heathrow

Fri 1/23

6:00 am-3:25 pm

1 stop15h 25m

$553

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 2/4

4:25 pm-9:30 am

1 stop11h 05m

London City

Wed 2/11

9:20 am-2:20 pm

1 stop11h 00m

$608

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 1/28

6:50 pm-12:55 pm

1 stop12h 05m

London City

Wed 2/4

9:20 am-4:20 pm

1 stop13h 00m

$619

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Tue 1/20

6:50 pm-5:05 pm

1 stop16h 15m

London City

Tue 1/27

9:15 am-4:20 pm

1 stop13h 05m

$624

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 2/4

4:25 pm-8:10 am

1 stop9h 45m

London City

Wed 2/11

9:20 am-2:20 pm

1 stop11h 00m

$634

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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

Delays

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 October. Flight prices, which tend to average around $641, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around $642.

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 $770. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $918. 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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $760 when looking at flights departing at noon. Flights to London are more costly in the afternoon, with an average ticket price of $830. 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 $795 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 $702 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 10% 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 December 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 74% more expensive 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	$399
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	6 airports

The best one-way flight to London from Chicago O'Hare Intl Airport in the past 72 hours is $399. The best round-trip flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is $667.

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 are 6 airports in London. From Chicago O'Hare Intl Airport there are direct flights to 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 18 as of December 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 (39.38% of total bookings). The next most popular plane models are Boeing 767-300 (21.24%), Boeing 787-10 Dreamliner (15.53%), and Boeing 777 (12.11%).
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 21%, United Airlines with 13%, and American Airlines with 12%.

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 2,898 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $331	Free Cancellation	Rating 7.4 1,620 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $345	Free Cancellation	Rating 7.9 8,015 reviews	Search Delta flights
TAP AIR PORTUGAL	PriceFrom $428	Free Cancellation	Rating 7.2 2,096 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $460	Free Cancellation	Rating 6.8 7,649 reviews	Search Lufthansa flights
Icelandair	PriceFrom $477	Free Cancellation	Rating 7.0 592 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $494	Free Cancellation	Rating 7.2 1,412 reviews	Search Aer Lingus flights
British Airways	PriceFrom $502	Free Cancellation	Rating 6.7 7,607 reviews	Search British Airways flights
Finnair	PriceFrom $517	Free Cancellation	Rating 7.6 1,339 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 $522. Generally, Alaska Airlines has 28 flights on this route every week with an average price of $809. Alaska Airlines is rated 8.0/10 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 $517, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $759 round-trip. Finnair operates 28 flights out of Chicago O'Hare Intl Airport into London in an average week, so prices vary by time and availability. 1,339 Finnair reviews by users on momondo have scored the airline at 7.6/10.

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Wembley

Watford

Ilford

Cobham

Folkestone

Romford

Richmond

Uxbridge

Stansted

Why use momondo?

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

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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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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London

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 10% 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 December 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 74% more expensive when compared to flights at the same time last year.

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

British Airways, TAP AIR PORTUGAL, and Lufthansa are the most popular carriers operating from Chicago O'Hare Intl to London

What airlines fly to London?

How often are flights from Chicago to London delayed?

Historically, on average around 25% of flights between Chicago and London have experienced a delay on any given week. The average delay length over the past 12 months has been 168 minutes.

What is the most punctual flight time for Chicago to London flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Chicago to London flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 23% of their flights experiencing any sort of delay.

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

Reykjavik (KEF) was the most common stop: 39% 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 57m.

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 16m.

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

As of December 2025, 45 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 5:00PM, with 56% 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 December 2025, 315 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 14% 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

Alaska Airlines 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?