Which airlines fly to London?

British Airways, Iberia and Finnair 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 48% 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.

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

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

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 21:00, with 62% of daily flights taking off in the evening.

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. Thursday has historically seen more delays on average compared to the rest of the week.

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 315 per week as of December 2025. The most frequent departure day is Fri, with 15% of weekly flights leaving on this day.

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

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

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.

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.

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 December 2025, 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.

£277 Cheap Flights from Chicago O'Hare Intl Airport to London in 2025/26

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07:01 - 09:20

ORD

LHR

20h 19m2 stops

10:20 - 16:45

LHR

ORD

12h 25m1 stop

£417Scandinavian Airlines

Fri, 23 Jan - Sat, 31 Jan

19:20 - 22:10

ORD

LTN

20h 50m2 stops

20:50 - 16:45

LTN

ORD

25h 55m2 stops

£417Multiple Airlines

Thu, 26 Feb - Wed, 4 Mar

19:25 - 20:20

ORD

LHR

18h 55m1 stop

21:25 - 21:40

LHR

ORD

30h 15m1 stop

£418Icelandair

Thu, 7 May - Sun, 14 Jun

20:15 - 09:50

ORD

LGW

31h 35m1 stop

16:35 - 14:45

LGW

ORD

28h 10m1 stop

£418TAP AIR PORTUGAL

Fri, 23 Jan - Sat, 31 Jan

19:20 - 18:30

ORD

LHR

17h 10m2 stops

10:20 - 16:45

LHR

ORD

12h 25m1 stop

£418Scandinavian Airlines

Fri, 16 Jan - Fri, 23 Jan

18:30 - 21:05

ORD

LGW

20h 35m2 stops

08:50 - 17:20

LGW

ORD

14h 30m2 stops

£419Multiple Airlines

Wed, 18 Feb - Wed, 25 Feb

20:20 - 16:25

ORD

LHR

15h 05m2 stops

07:05 - 17:45

LHR

ORD

15h 40m2 stops

£419Scandinavian Airlines

Wed, 18 Mar - Wed, 25 Mar

19:25 - 20:20

ORD

LHR

18h 55m1 stop

13:05 - 18:15

LHR

ORD

11h 10m1 stop

£420Icelandair

Sun, 10 May - Wed, 10 Jun

16:25 - 09:30

ORD

LCY

11h 05m1 stop

08:40 - 14:20

LCY

ORD

11h 40m1 stop

£461Virgin Atlantic

Wed, 21 Jan - Wed, 28 Jan

16:25 - 08:10

ORD

LCY

9h 45m1 stop

08:40 - 14:20

LCY

ORD

11h 40m1 stop

£472Virgin Atlantic

Wed, 21 Jan - Wed, 28 Jan

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

23 Jan

ORD07:01Chicago O'Hare Intl

20h 19m

2 stops

LHR09:20London Heathrow

31 Jan

LHR10:20London Heathrow

12h 25m

1 stop

ORD16:45Chicago O'Hare Intl

£417

Find similar

Scandinavian Airlines

16 Jan

ORD19:20Chicago O'Hare Intl

17h 10m

2 stops

LHR18:30London Heathrow

23 Jan

LHR10:20London Heathrow

12h 25m

1 stop

ORD16:45Chicago O'Hare Intl

£418

Find similar

Scandinavian Airlines

18 Mar

ORD20:20Chicago O'Hare Intl

15h 05m

2 stops

LHR16:25London Heathrow

25 Mar

LHR07:05London Heathrow

15h 40m

2 stops

ORD17:45Chicago O'Hare Intl

£419

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

23 Jan

ORD20:15Chicago O'Hare Intl

31h 35m

1 stop

LGW09:50London Gatwick

31 Jan

LGW16:35London Gatwick

28h 10m

1 stop

ORD14:45Chicago O'Hare Intl

£418

Find similar

TAP AIR PORTUGAL

16 Jan

ORD20:15Chicago O'Hare Intl

15h 15m

1 stop

LHR17:30London Heathrow

1 Feb

LHR06:00London Heathrow

14h 45m

1 stop

ORD14:45Chicago O'Hare Intl

£430

Find similar

TAP AIR PORTUGAL

23 Jan

ORD20:15Chicago O'Hare Intl

13h 30m

1 stop

LGW15:45London Gatwick

27 Jan

LGW21:20London Gatwick

23h 40m

2 stops

ORD15:00Chicago O'Hare Intl

£436

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.

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Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 23/1

07:01-09:20

2 stops20h 19m

London Heathrow

Sat 31/1

10:20-16:45

1 stop12h 25m

£417

ChicagoLondon

ORD - LTN

ORDLTN

Chicago O'Hare Intl

Thu 26/2

19:20-22:10

2 stops20h 50m

London Luton

Wed 4/3

20:50-16:45

2 stops25h 55m

£417

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 7/5

19:25-20:20

1 stop18h 55m

London Heathrow

Sun 14/6

21:25-21:40

1 stop30h 15m

£418

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 23/1

20:15-09:50

1 stop31h 35m

London Gatwick

Sat 31/1

16:35-14:45

1 stop28h 10m

£418

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 16/1

19:20-18:30

2 stops17h 10m

London Heathrow

Fri 23/1

10:20-16:45

1 stop12h 25m

£418

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 18/2

18:30-21:05

2 stops20h 35m

London Gatwick

Wed 25/2

08:50-17:20

2 stops14h 30m

£419

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 18/3

20:20-16:25

2 stops15h 05m

London Heathrow

Wed 25/3

07:05-17:45

2 stops15h 40m

£419

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 10/5

19:25-20:20

1 stop18h 55m

London Heathrow

Wed 10/6

13:05-18:15

1 stop11h 10m

£420

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 21/1

16:25-09:30

1 stop11h 05m

London City

Wed 28/1

08:40-14:20

1 stop11h 40m

£461

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 21/1

16:25-08:10

1 stop9h 45m

London City

Wed 28/1

08:40-14:20

1 stop11h 40m

£472

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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

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 £479, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around £481.

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 £511. 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 £683.

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 afternoon when flights can be purchased for as low as £568. Flights at midday are often more expensive, with an average ticket price of £821.

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 £597 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 £526 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 16% 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 66% 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	£361
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 £361. The best return flight deal from Chicago O'Hare Intl Airport to London found on momondo in the last 72 hours is £567.

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?
There are 3950.9 mi between Chicago O'Hare Intl and London. Typically, this will take 9h 45m 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 December 2025, 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 (38.26% of total bookings). The next most popular plane models are Boeing 767-300 (19.19%), Boeing 787-10 Dreamliner (17.03%), and Boeing 777 (14.26%).
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 55% of all bookings. The subsequent popular airlines are United Airlines at 17%, Iberia at 16%, and Icelandair at 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
Lufthansa	PriceFrom £361	Free Cancellation	Rating 6.8 7,616 reviews	Search Lufthansa flights
American Airlines	PriceFrom £388	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights
Finnair	PriceFrom £417	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
British Airways	PriceFrom £426	Free Cancellation	Rating 6.7 7,564 reviews	Search British Airways flights
Iberia	PriceFrom £449	Free Cancellation	Rating 7.0 3,042 reviews	Search Iberia flights
Aer Lingus	PriceFrom £452	Free Cancellation	Rating 7.2 1,389 reviews	Search Aer Lingus flights
United Airlines	PriceFrom £465	Free Cancellation	Rating 7.4 9,078 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 £417 round-trip. Over the 26 Finnair flights for this route in a normal week, average airfare is usually £680 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, 9,084 ratings). United Airlines flies from Chicago O'Hare Intl Airport to London around 21 times per week, with deals starting from £465 round-trip and rising to an average price of around £700.

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Why use momondo?

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 £277

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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?

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 £511. 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 £683.

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 afternoon when flights can be purchased for as low as £568. Flights at midday are often more expensive, with an average ticket price of £821.

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 16% 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 66% 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?

TAP AIR PORTUGAL, Austrian Airlines, and Icelandair 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 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 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. 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 fewest delays on this route over the last 12 months, with about 23% 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 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 21:00, with 62% 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 315 per week as of December 2025. The most frequent departure day is Fri, 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.