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

The number of flights available between Chicago O'Hare Intl Airport and London is 307 per week as of January 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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 167 minutes.

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

As of January 2026, 43 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 17:00, with 55% of daily flights taking off in the evening.

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 departing in the morning have, in the past, seen delays more frequently in comparison.

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

According to our data, American Airlines have had the fewest delays on this route over the last 12 months, with about 25% of their flights experiencing any sort of delay.

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

Scandinavian Airlines, JetBlue, and TAP AIR PORTUGAL are the most popular carriers operating from Chicago O'Hare Intl to London

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

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

Which airlines fly to London?

British Airways, Iberia and Aer Lingus 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 travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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 were last updated today.

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

As of January 2026, there are 7 operators available to choose from 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 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.

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.

£258 Cheap Flights from Chicago O'Hare Intl Airport to London in 2026

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19:25 - 11:55

ORD

LHR

10h 30m

1 stop

13:05 - 18:15

LHR

ORD

11h 10m

1 stop

£378Icelandair

Tue, 21 Apr - Sat, 2 May

19:25 - 11:55

ORD

LHR

10h 30m

1 stop

21:25 - 18:15

LHR

ORD

26h 50m

1 stop

£379Icelandair

Fri, 24 Apr - Sun, 3 May

06:40 - 06:00

ORD

LGW

17h 20m

1 stop

14:00 - 09:06

LGW

ORD

25h 06m

1 stop

£379Multiple Airlines

Sun, 1 Mar - Thu, 5 Mar

20:16 - 06:00

ORD

LGW

27h 44m

2 stops

14:00 - 09:06

LGW

ORD

25h 06m

1 stop

£380Multiple Airlines

Tue, 24 Feb - Thu, 5 Mar

19:25 - 11:55

ORD

LHR

10h 30m

1 stop

13:05 - 18:15

LHR

ORD

11h 10m

1 stop

£380Icelandair

Tue, 21 Apr - Wed, 6 May

19:15 - 09:35

ORD

LHR

32h 20m

2 stops

06:40 - 16:10

LHR

ORD

15h 30m

1 stop

£383Scandinavian Airlines

Fri, 24 Apr - Mon, 27 Apr

18:00 - 20:30

ORD

LGW

20h 30m

2 stops

16:30 - 16:00

LGW

ORD

29h 30m

1 stop

£383TAP AIR PORTUGAL

Wed, 8 Apr - Sat, 18 Apr

20:25 - 15:45

ORD

LGW

13h 20m

1 stop

10:40 - 15:00

LGW

ORD

34h 20m

1 stop

£384TAP AIR PORTUGAL

Sun, 8 Feb - Tue, 17 Feb

18:50 - 12:55

ORD

LCY

12h 05m

1 stop

09:20 - 16:20

LCY

ORD

13h 00m

1 stop

£454SWISS

Wed, 18 Feb - Wed, 25 Feb

18:50 - 12:55

ORD

LCY

12h 05m

1 stop

09:15 - 16:20

LCY

ORD

13h 05m

1 stop

£456SWISS

Tue, 24 Feb - Tue, 3 Mar

Icelandair flights from Chicago O'Hare Intl Airport to London

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

Icelandair

24 Apr

ORD22:25Chicago O'Hare Intl

15h 55m

1 stop

LHR20:20London Heathrow

1 May

LHR21:25London Heathrow

26h 50m

1 stop

ORD18:15Chicago O'Hare Intl

£379

Icelandair

24 Apr

ORD19:25Chicago O'Hare Intl

10h 30m

1 stop

LHR11:55London Heathrow

9 May

LHR21:25London Heathrow

26h 50m

1 stop

ORD18:15Chicago O'Hare Intl

£381

Icelandair

17 Mar

ORD19:30Chicago O'Hare Intl

10h 20m

1 stop

LHR10:50London Heathrow

25 Mar

LHR20:35London Heathrow

26h 45m

1 stop

ORD18:20Chicago O'Hare Intl

£382

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

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

United Airlines

9 Feb

ORD21:05Chicago O'Hare Intl

8h 10m

LHR11:15London Heathrow

18 Feb

LHR06:35London Heathrow

13h 35m

1 stop

ORD14:10Chicago O'Hare Intl

£454

United Airlines

4 Feb

ORD21:05Chicago O'Hare Intl

8h 10m

LHR11:15London Heathrow

4 Mar

LHR06:50London Heathrow

11h 20m

1 stop

ORD12:10Chicago O'Hare Intl

£454

United Airlines

3 Feb

ORD21:05Chicago O'Hare Intl

8h 10m

LHR11:15London Heathrow

13 Feb

LHR06:35London Heathrow

13h 35m

1 stop

ORD14:10Chicago O'Hare Intl

£455

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.

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Route

Depart

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Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 21/4

19:25-11:55

1 stop10h 30m

London Heathrow

Sat 2/5

13:05-18:15

1 stop11h 10m

£378

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 24/4

19:25-11:55

1 stop10h 30m

London Heathrow

Sun 3/5

21:25-18:15

1 stop26h 50m

£379

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 1/3

06:40-06:00

1 stop17h 20m

London Gatwick

Thu 5/3

14:00-09:06

1 stop25h 06m

£379

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Tue 24/2

20:16-06:00

2 stops27h 44m

London Gatwick

Thu 5/3

14:00-09:06

1 stop25h 06m

£380

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 21/4

19:25-11:55

1 stop10h 30m

London Heathrow

Wed 6/5

13:05-18:15

1 stop11h 10m

£380

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 24/4

19:15-09:35

2 stops32h 20m

London Heathrow

Mon 27/4

06:40-16:10

1 stop15h 30m

£383

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 8/4

18:00-20:30

2 stops20h 30m

London Gatwick

Sat 18/4

16:30-16:00

1 stop29h 30m

£383

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 8/2

20:25-15:45

1 stop13h 20m

London Gatwick

Tue 17/2

10:40-15:00

1 stop34h 20m

£384

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 18/2

18:50-12:55

1 stop12h 05m

London City

Wed 25/2

09:20-16:20

1 stop13h 00m

£454

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Tue 24/2

18:50-12:55

1 stop12h 05m

London City

Tue 3/3

09:15-16:20

1 stop13h 05m

£456

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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

Prices

Airlines

Delays

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 February. Flight prices, which tend to average around £466, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around £467.

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

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £490. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to London for around £649.

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

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £550. Flights in the afternoon are often more expensive, with an average ticket price of £562.

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 £571 when searching weeks before you fly. 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 £501 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 23% 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 January 2026, prices for Chicago O'Hare Intl Airport to London flights are approximately 49% 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 return 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	£290
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 £290. The best return flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is £484.

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?
There are 3950.9 mi between Chicago O'Hare Intl and London. Typically, this will take 7h 40m by plane in normal conditions.
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 were last updated today.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London?
As of January 2026, there are 7 operators available to choose from 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 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.
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 (38.70% of total bookings). The next most popular plane models are Boeing 767-300 (23.10%), Boeing 787-10 Dreamliner (14.47%), and Boeing 777 (11.38%).
What is the most popular airline from Chicago O'Hare Intl Airport to London?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to London is British Airways, representing 56% of all bookings. The subsequent popular airlines are United Airlines at 24% and Iberia at 20%.

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
Lufthansa	PriceFrom £350	Free Cancellation	Rating 6.8 7,749 reviews	Search Lufthansa flights
American Airlines	PriceFrom £377	Free Cancellation	Rating 7.2 11,200 reviews	Search American Airlines flights
Finnair	PriceFrom £405	Free Cancellation	Rating 7.6 1,356 reviews	Search Finnair flights
British Airways	PriceFrom £413	Free Cancellation	Rating 6.7 7,704 reviews	Search British Airways flights
Aer Lingus	PriceFrom £439	Free Cancellation	Rating 7.2 1,442 reviews	Search Aer Lingus flights
Iberia	PriceFrom £444	Free Cancellation	Rating 7.0 3,099 reviews	Search Iberia flights
United Airlines	PriceFrom £452	Free Cancellation	Rating 7.4 9,206 reviews	Search United Airlines flights

Finnair Flights From Chicago O'Hare Intl Airport to London
Finnair flight deals from Chicago O'Hare Intl Airport to London start from £405 round-trip. Over the 27 Finnair flights for this route in a normal week, average airfare is usually £563 round-trip - but some users have found much cheaper deals with momondo.
United Airlines Flights From Chicago O'Hare Intl Airport to London
Another popular option for Chicago O'Hare Intl Airport to London flights is United Airlines (7.4/10, 9,213 ratings). United Airlines flies from Chicago O'Hare Intl Airport to London around 21 times per week, with deals starting from £452 round-trip and rising to an average price of around £649.

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to London. momondo saves you time and could save you money on your trip.

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 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 simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Chicago and alert you when they change.

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Cheap flights from Chicago O'Hare Intl Airport to London from £258

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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?

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £490. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to London for around £649.

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

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £550. Flights in the afternoon are often more expensive, with an average ticket price of £562.

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 23% 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 January 2026, prices for Chicago O'Hare Intl Airport to London flights are approximately 49% 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?

Scandinavian Airlines, JetBlue, and TAP AIR PORTUGAL are the most popular carriers operating from Chicago O'Hare Intl to London

Which 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 167 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 departing 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 that experiences the fewest delays on this flight route. Sunday 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, American Airlines have had the fewest delays on this route over the last 12 months, with about 25% of their flights experiencing any sort of delay.

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

As of January 2026, 43 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 17:00, with 55% of daily flights taking off in the evening.

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

The number of flights available between Chicago O'Hare Intl Airport and London is 307 per week as of January 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving 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

Finnair Flights From Chicago O'Hare Intl Airport to London

United Airlines Flights From Chicago O'Hare Intl Airport to London

Travelling 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, organise 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