What is the cheapest airline that flies from London to Chicago?

Austrian Airlines, Iberia, and Finnair are the most popular carriers operating from London to Chicago

Which airport is the most popular layover for flights between London and Chicago?

Reykjavik (KEF) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

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

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

How many flights depart from London to Chicago on average per week?

234 flights are operational weekly from London to Chicago as of December 2025. The most popular departure day for this route is Wed, with 18% of flights per week taking off on this day.

Which layover airport has the shortest travel time from London to Chicago?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 10m.

How many flights depart from London to Chicago on average per day?

As of December 2025, there are 33 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 68% of flights taking off in the afternoon.

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

Which layover airport offers the lowest fares from London to Chicago?

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $539.

Which layover airport has the shortest connection time from London to Chicago?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 03m.

What airlines fly to Chicago?

British Airways, American Airlines and Aer Lingus are the top three most popular airlines that fly to Chicago from London according to our data. British Airways is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 10 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

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

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

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

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

When did momondo last update prices for flights from London to Chicago?

Prices for flights from London to Chicago refresh daily.

How many operators does momondo search for flights from London to Chicago?

As of December 2025, there are 10 operators available to choose from for flights from London to Chicago.

How old do you have to be to fly from London to Chicago?

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 London to Chicago.

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

The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$397 Cheap Flights from London to Chicago in 2025/26

Q: What is the typical price of a round-trip flight between London and Chicago?

Prices are currently low for flights on this route. Typical prices usually range from $654 to $1,006. The lowest price recently found on this route was $608.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:00 pm - 6:29 pm

LGW

ORD

35h 29m1 stop

4:33 pm - 10:00 am

ORD

LGW

35h 27m2 stops

$608Multiple Airlines

Sun, Jan 25 - Sun, Feb 1

2:00 pm - 5:12 pm

LGW

ORD

33h 12m1 stop

6:17 pm - 6:00 am

ORD

LGW

29h 43m1 stop

$611Multiple Airlines

Thu, Feb 26 - Sat, Feb 28

11:55 am - 5:20 pm

LGW

ORD

11h 25m1 stop

7:25 pm - 2:40 pm

ORD

LGW

13h 15m1 stop

$615Icelandair

Fri, Feb 27 - Tue, Jun 30

11:55 am - 5:20 pm

LGW

ORD

11h 25m1 stop

6:30 pm - 10:55 am

ORD

LGW

10h 25m1 stop

$617Icelandair

Mon, Jan 12 - Mon, Jan 19

10:20 am - 4:45 pm

LHR

ORD

12h 25m1 stop

7:10 pm - 6:50 pm

ORD

LHR

17h 40m2 stops

$624Scandinavian Airlines

Mon, Jan 19 - Sun, Feb 1

5:30 pm - 4:45 pm

LHR

ORD

29h 15m2 stops

7:20 pm - 4:00 pm

ORD

LHR

14h 40m1 stop

$626Scandinavian Airlines

Wed, Dec 24 - Thu, Jan 22

6:35 am - 2:10 pm

LHR

ORD

13h 35m1 stop

5:50 pm - 7:55 am

ORD

LHR

8h 05mnonstop

$627Lufthansa

Wed, Jan 21 - Wed, Jan 28

8:05 pm - 12:45 pm

LHR

ORD

22h 40m1 stop

6:50 pm - 1:00 pm

ORD

LHR

12h 10m1 stop

$628SWISS

Mon, Jan 12 - Mon, Jan 19

7:30 am - 3:20 pm

LHR

ORD

13h 50m1 stop

3:45 pm - 5:55 am

ORD

LHR

8h 10mnonstop

$633Lufthansa

Mon, Jan 12 - Mon, Jan 19

9:20 am - 4:20 pm

LCY

ORD

13h 00m1 stop

6:50 pm - 12:55 pm

ORD

LCY

12h 05m1 stop

$654SWISS

Wed, Jan 21 - Wed, Jan 28

Icelandair flights from London to Chicago

Our best Icelandair deals on London to Chicago flight tickets

Icelandair

Mar 17

LHR12:15 pmLondon Heathrow

11h 05m

1 stop

ORD6:20 pmChicago O'Hare Intl

May 4

ORD7:25 pmChicago O'Hare Intl

18h 55m

1 stop

LHR8:20 pmLondon Heathrow

$608

Find similar

Icelandair

Mar 15

LHR8:35 pmLondon Heathrow

26h 45m

1 stop

ORD6:20 pmChicago O'Hare Intl

May 5

ORD7:25 pmChicago O'Hare Intl

18h 55m

1 stop

LHR8:20 pmLondon Heathrow

$609

Find similar

Icelandair

Feb 27

LGW11:55 amLondon Gatwick

11h 25m

1 stop

ORD5:20 pmChicago O'Hare Intl

Jun 30

ORD7:25 pmChicago O'Hare Intl

13h 15m

1 stop

LGW2:40 pmLondon Gatwick

$615

Find similar

Scandinavian Airlines flights from London to Chicago

Our best Scandinavian Airlines deals on London to Chicago flight tickets

Scandinavian Airlines

Mar 19

LHR10:20 amLondon Heathrow

12h 25m

1 stop

ORD5:45 pmChicago O'Hare Intl

Apr 29

ORD7:15 pmChicago O'Hare Intl

14h 45m

1 stop

LHR4:00 pmLondon Heathrow

$611

Find similar

Scandinavian Airlines

Mar 15

LHR6:40 amLondon Heathrow

40h 05m

2 stops

ORD5:45 pmChicago O'Hare Intl

Apr 29

ORD7:15 pmChicago O'Hare Intl

14h 45m

1 stop

LHR4:00 pmLondon Heathrow

$614

Find similar

Scandinavian Airlines

Mar 25

LHR6:40 amLondon Heathrow

16h 05m

1 stop

ORD5:45 pmChicago O'Hare Intl

Apr 15

ORD7:15 pmChicago O'Hare Intl

14h 45m

1 stop

LHR4:00 pmLondon Heathrow

$615

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sun 1/25

1:00 pm-6:29 pm

1 stop35h 29m

Chicago O'Hare Intl

Sun 2/1

4:33 pm-10:00 am

2 stops35h 27m

$608

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 2/26

2:00 pm-5:12 pm

1 stop33h 12m

Chicago O'Hare Intl

Sat 2/28

6:17 pm-6:00 am

1 stop29h 43m

$611

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 2/27

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 6/30

7:25 pm-2:40 pm

1 stop13h 15m

$615

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 1/12

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Mon 1/19

6:30 pm-10:55 am

1 stop10h 25m

$617

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/19

10:20 am-4:45 pm

1 stop12h 25m

Chicago O'Hare Intl

Sun 2/1

7:10 pm-6:50 pm

2 stops17h 40m

$624

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/24

5:30 pm-4:45 pm

2 stops29h 15m

Chicago O'Hare Intl

Thu 1/22

7:20 pm-4:00 pm

1 stop14h 40m

$626

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 1/21

6:35 am-2:10 pm

1 stop13h 35m

Chicago O'Hare Intl

Wed 1/28

5:50 pm-7:55 am

Nonstop8h 05m

$627

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/12

8:05 pm-12:45 pm

1 stop22h 40m

Chicago O'Hare Intl

Mon 1/19

6:50 pm-1:00 pm

1 stop12h 10m

$628

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/12

7:30 am-3:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 1/19

3:45 pm-5:55 am

Nonstop8h 10m

$633

LondonChicago

LCY - ORD

LCYORD

London City

Wed 1/21

9:20 am-4:20 pm

1 stop13h 00m

Chicago O'Hare Intl

Wed 1/28

6:50 pm-12:55 pm

1 stop12h 05m

$654

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 London to Chicago

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 typical price of a round-trip flight between London and Chicago?

What is the cheapest month to fly to Chicago?

The month of February is, on average, the cheapest month to fly to Chicago from London, with most prices found around $576. If you’re not able to fly to Chicago in February, then September is your next best option. Flight prices from London to Chicago during September average around $582.

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

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as $775. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London to Chicago for around $871.

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

Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $878.

What is the cheapest London to Chicago flight route?

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

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

You are more likely to see cheaper flights to Chicago from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $725 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London for as low as $696 on momondo.

What cabin class options are available on London to Chicago flights?

There are 4 cabin classes available to choose from on London to Chicago 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 London to Chicago flights?

No. A direct flight is the cheapest option for a flight between London to Chicago.

How have London to Chicago flight prices changed over time?

As of December 2025, prices for London to Chicago flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from London to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from London to Chicago according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap London to Chicago (LON to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago

Best Price Found	$637
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Chicago	3 airports

The best one-way flight to Chicago from London in the past 72 hours is $637. The best round-trip flight deal from London to Chicago found on momondo in the last 72 hours is $739.

The fastest flight from London to Chicago takes 8h 40m

Direct flights go from London to Chicago every day.

There are 3 airports in Chicago. From London there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

How far is London to Chicago by plane?
A flight from London to Chicago will travel around 3945.2 mi. Flights usually cover this in 8h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Chicago?
Prices for flights from London to Chicago refresh daily.
How many operators does momondo search for flights from London to Chicago?
As of December 2025, there are 10 operators available to choose from for flights from London to Chicago.
How old do you have to be to fly from London to Chicago?
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 London to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London to Chicago?
momondo data reveals that the most frequently booked plane model on the route from London to Chicago is Boeing 767-300, representing 35.46% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 20.88%, Boeing 777 at 12.52%, and Boeing 787-10 Dreamliner at 11.89%.
What is the most popular airline from London to Chicago?
momondo data reveals that the most frequently booked airline on the route from London to Chicago is British Airways, representing 37% of all bookings. The subsequent popular airlines are American Airlines at 15%, Icelandair at 13%, and United Airlines at 10%.

Best airlines flying from London to Chicago

Compare and see reviews for airlines that fly from London to Chicago with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $390	Free Cancellation	Rating 7.0 589 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,394 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 2,089 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $558	Free Cancellation	Rating 7.0 3,045 reviews	Search Iberia flights
American Airlines	PriceFrom $572	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights
Finnair	PriceFrom $625	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
Lufthansa	PriceFrom $720	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights

Austrian Airlines Flights From London to Chicago
Austrian Airlines flight deals from London to Chicago start from $530 round-trip. Over the 13 Austrian Airlines flights for this route in a normal week, average airfare is usually $897 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London to Chicago
The best Finnair deal for London to Chicago flight tickets found on momondo in the last 72 hours was $625, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $808 round-trip. Finnair operates 22 flights out of London into Chicago in an average week, so prices vary by time and availability. 1,334 Finnair reviews by users on momondo have scored the airline at 7.6/10.

Merrillville

New Buffalo

Hammond

Benton Harbor

Saint Joseph

Portage

Lansing

Schererville

Valparaiso

Crown Point

Munster

Chesterton

Monticello

Porter

Griffith

Saint John

Why use momondo?

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

It is quick and easy to find London to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.

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

Yes. All flights to Chicago from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Chicago?

momondo provides multiple filters to help you find the best flight to Chicago from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

An easier way to manage your Chicago 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Sat 1/10

Sat 1/17

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Chicago Midway Airport

Chicago O'Hare Intl Airport

Chicago Greater Rockford Airport

Popular cities in the United States

Flights to New Yorkfrom $34

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Orlandofrom $41

Flights to San Franciscofrom $53

Flights to Las Vegasfrom $40

Flights to Washington, D.C.from $49

Flights to Bostonfrom $55

Flights to Atlantafrom $49

Flights to Dallasfrom $52

Flights to Seattlefrom $58

Flights to Denverfrom $47

Cheap flights from London to Chicago from $529

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Chicago departing on 1/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Chicago

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Icelandair flights from London to Chicago

Our best Icelandair deals on London to Chicago flight tickets

Scandinavian Airlines flights from London to Chicago

Our best Scandinavian Airlines deals on London to Chicago flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London to Chicago that are best for you.

See travel insights to Chicago from

How to get the cheapest flight ticket from London to Chicago

What is the typical price of a round-trip flight between London and Chicago?

What is the cheapest month to fly to Chicago?

The month of February is, on average, the cheapest month to fly to Chicago from London, with most prices found around $576. If you’re not able to fly to Chicago in February, then September is your next best option. Flight prices from London to Chicago during September average around $582.

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

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

Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $878.

What is the cheapest London to Chicago flight route?

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

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

What cabin class options are available on London to Chicago flights?

There are 4 cabin classes available to choose from on London to Chicago 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 London to Chicago flights?

No. A direct flight is the cheapest option for a flight between London to Chicago.

How have London to Chicago flight prices changed over time?

As of December 2025, prices for London to Chicago flights are approximately 2% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London to Chicago?

Austrian Airlines, Iberia, and Finnair are the most popular carriers operating from London to Chicago

What airlines fly to Chicago?

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 172 minutes.

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

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

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

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

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

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between London and Chicago?

Reykjavik (KEF) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from London to Chicago?

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $539.

Which layover airport has the shortest travel time from London to Chicago?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 10m.

Which layover airport has the shortest connection time from London to Chicago?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 03m.

How many flights depart from London to Chicago on average per day?

As of December 2025, there are 33 flights per day flying from London to Chicago. The most common time of day flights depart is 12:00PM, with 68% of flights taking off in the afternoon.

How many flights depart from London to Chicago on average per week?

234 flights are operational weekly from London to Chicago as of December 2025. The most popular departure day for this route is Wed, with 18% of flights per week taking off on this day.

When to book flights from London to Chicago

Cheap London to Chicago (LON to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Chicago

Best Price Found

Fastest flight time

Direct flights

Airports in Chicago

How far is London to Chicago by plane?

When did momondo last update prices for flights from London to Chicago?

How many operators does momondo search for flights from London to Chicago?

How old do you have to be to fly from London to Chicago?

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

What is the most popular plane model from London to Chicago?

What is the most popular airline from London to Chicago?

Best airlines flying from London to Chicago

Compare and see reviews for airlines that fly from London to Chicago with momondo

Austrian Airlines Flights From London to Chicago

Finnair Flights From London to Chicago

Traveling to a place near Chicago?