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

Dublin (DUB) was the most common stop: 69% of momondo users choosing 1-stop flights on this route connected there.

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

Reykjavik (KEF) has the shortest average layover time for this route: 1h 05m.

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 Heathrow Airport according to our data. British Airways is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 11 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between London Heathrow Airport and Chicago is 354 per week as of August 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $491.

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

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 05m.

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

The number of flights available between London Heathrow Airport and Chicago is 50 per day as of August 2025. The most frequent departure time is 2:00PM, with 53% of daily flights leaving in the afternoon.

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

Aer Lingus, TAP AIR PORTUGAL, and Icelandair are the most popular carriers operating from London Heathrow to Chicago

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

Prices for flights from London Heathrow Airport to Chicago were last updated today.

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

There are 11 operators available for flights from London Heathrow Airport to Chicago as of August 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Chicago.

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

The travel and health documents you'll need for your trip to Chicago 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 Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$398 Cheap Flights from London Heathrow Airport to Chicago (LHR-CHI) in 2025

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

Prices are currently low for flights on this route. Typical prices usually range from $577 to $744. The lowest price recently found on this route was $567.

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Find the cheapest flights from London Heathrow Airport to Chicago (LHR-CHI)

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:00 am - 1:20 pmLHR-ORD

13h 20m1 stop

9:25 pm - 11:45 amORD-LHR

8h 20mnonstop

$567Austrian Airlines

Find Deal

Mon, Sep 8 - Sun, Oct 5

7:40 am - 3:45 pmLHR-ORD

14h 05m1 stop

8:40 pm - 10:30 amORD-LHR

7h 50mnonstop

$568American Airlines

Find Deal

Thu, Sep 11 - Mon, Sep 15

7:40 am - 3:45 pmLHR-ORD

14h 05m1 stop

5:40 pm - 7:20 amORD-LHR

7h 40mnonstop

$569American Airlines

Find Deal

Thu, Sep 18 - Fri, Oct 17

7:30 am - 2:55 pmLHR-ORD

13h 25m1 stop

4:00 pm - 6:20 amORD-LHR

8h 20mnonstop

$570United Airlines

Find Deal

Sun, Sep 7 - Tue, Sep 30

1:25 pm - 7:00 pmLHR-ORD

11h 35m1 stop

3:45 pm - 8:00 amORD-LHR

10h 15m1 stop

$574Aer Lingus

Find Deal

Thu, Oct 2 - Tue, Oct 14

9:15 am - 11:50 amLHR-ORD

8h 35mnonstop

5:40 pm - 7:20 amORD-LHR

7h 40mnonstop

$576British Airways

Find Deal

Sun, Sep 14 - Mon, Oct 6

9:25 pm - 6:15 pmLHR-ORD

26h 50m1 stop

7:25 pm - 11:55 amORD-LHR

10h 30m1 stop

$581Icelandair

Find Deal

Wed, Sep 10 - Tue, Sep 23

2:25 pm - 5:00 pmLHR-ORD

8h 35mnonstop

10:35 pm - 12:15 pmORD-LHR

7h 40mnonstop

$582British Airways

Find Deal

Mon, Sep 8 - Mon, Sep 29

9:25 pm - 6:15 pmLHR-ORD

26h 50m1 stop

6:30 pm - 10:50 amORD-LHR

10h 20m1 stop

$595Icelandair

Find Deal

Mon, Oct 20 - Mon, Nov 3

8:30 am - 11:30 amLHR-ORD

9h 00mnonstop

3:05 pm - 8:40 amORD-LHR

11h 35m1 stop

$608Lufthansa

Find Deal

Mon, Sep 8 - Sat, Oct 4

Austrian Airlines flights from London Heathrow Airport to Chicago

Our best Austrian Airlines deals on London Heathrow Airport to Chicago flight tickets

Austrian Airlines

Sep 8

LHR6:00 amLondon Heathrow

13h 20m

1 stop

ORD1:20 pmChicago O'Hare Intl

Oct 5

ORD9:25 pmChicago O'Hare Intl

8h 20m

LHR11:45 amLondon Heathrow

$567

Find similar

Austrian Airlines

Sep 5

LHR6:00 amLondon Heathrow

13h 20m

1 stop

ORD1:20 pmChicago O'Hare Intl

Oct 5

ORD9:25 pmChicago O'Hare Intl

8h 20m

LHR11:45 amLondon Heathrow

$575

Find similar

Austrian Airlines

Sep 14

LHR6:00 amLondon Heathrow

13h 20m

1 stop

ORD1:20 pmChicago O'Hare Intl

Oct 18

ORD12:55 pmChicago O'Hare Intl

12h 00m

1 stop

LHR6:55 amLondon Heathrow

$577

Find similar

Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets

Icelandair

Sep 2

LHR9:25 pmLondon Heathrow

26h 50m

1 stop

ORD6:15 pmChicago O'Hare Intl

Sep 9

ORD7:25 pmChicago O'Hare Intl

18h 55m

1 stop

LHR8:20 pmLondon Heathrow

$573

Find similar

Icelandair

Sep 10

LHR9:25 pmLondon Heathrow

26h 50m

1 stop

ORD6:15 pmChicago O'Hare Intl

Sep 23

ORD7:25 pmChicago O'Hare Intl

10h 30m

1 stop

LHR11:55 amLondon Heathrow

$581

Find similar

Icelandair

Oct 20

LHR9:25 pmLondon Heathrow

26h 50m

1 stop

ORD6:15 pmChicago O'Hare Intl

Nov 3

ORD6:30 pmChicago O'Hare Intl

10h 20m

1 stop

LHR10:50 amLondon Heathrow

$595

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

6:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Sun 10/5

9:25 pm-11:45 am

Nonstop8h 20m

$567

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/11

7:40 am-3:45 pm

1 stop14h 05m

Chicago O'Hare Intl

Mon 9/15

8:40 pm-10:30 am

Nonstop7h 50m

$568

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/18

7:40 am-3:45 pm

1 stop14h 05m

Chicago O'Hare Intl

Fri 10/17

5:40 pm-7:20 am

Nonstop7h 40m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 9/7

7:30 am-2:55 pm

1 stop13h 25m

Chicago O'Hare Intl

Tue 9/30

4:00 pm-6:20 am

Nonstop8h 20m

$570

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/2

1:25 pm-7:00 pm

1 stop11h 35m

Chicago O'Hare Intl

Tue 10/14

3:45 pm-8:00 am

1 stop10h 15m

$574

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 9/14

9:15 am-11:50 am

Nonstop8h 35m

Chicago O'Hare Intl

Mon 10/6

5:40 pm-7:20 am

Nonstop7h 40m

$576

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/10

9:25 pm-6:15 pm

1 stop26h 50m

Chicago O'Hare Intl

Tue 9/23

7:25 pm-11:55 am

1 stop10h 30m

$581

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

2:25 pm-5:00 pm

Nonstop8h 35m

Chicago O'Hare Intl

Mon 9/29

10:35 pm-12:15 pm

Nonstop7h 40m

$582

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 10/20

9:25 pm-6:15 pm

1 stop26h 50m

Chicago O'Hare Intl

Mon 11/3

6:30 pm-10:50 am

1 stop10h 20m

$595

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 9/8

8:30 am-11:30 am

Nonstop9h 00m

Chicago O'Hare Intl

Sat 10/4

3:05 pm-8:40 am

1 stop11h 35m

$608

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 Heathrow Airport 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

Layovers

Other information

What is the typical price of a round-trip flight between London Heathrow Airport 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 Heathrow Airport, with most prices found around $598. If you’re not able to fly to Chicago in February, then March is your next best option. Flight prices from London Heathrow Airport to Chicago during March average around $606.

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 $784. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Chicago for around $910.

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 Heathrow Airport 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 $932.

What is the cheapest London Heathrow to Chicago flight route?

Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $731 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London Heathrow Airport for as low as $699 on momondo.

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

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

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

How have London Heathrow Airport to Chicago flight prices changed over time?

As of August 2025, prices for London Heathrow Airport to Chicago flights are approximately 37% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Chicago

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

Estimated round-trip price

Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips

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

Best Price Found	$650
Fastest flight time	8h 35m
Direct flights	Every day
Airports in Chicago	1 airport

The best one-way flight to Chicago from London Heathrow Airport in the past 72 hours is $650. The best round-trip flight deal from London Heathrow Airport to Chicago found on momondo in the last 72 hours is $672.

The fastest flight from London Heathrow Airport to Chicago takes 8h 35m

Direct flights go from London Heathrow Airport to Chicago every day.

There is 1 airport near Chicago: Chicago O'Hare Intl (ORD)

Search flight deals

How far is London Heathrow to Chicago by plane?
There are 3933.5 mi between London Heathrow and Chicago. 8h 35m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to Chicago?
Prices for flights from London Heathrow Airport to Chicago were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Chicago?
There are 11 operators available for flights from London Heathrow Airport to Chicago as of August 2025.
How old do you have to be to fly from London Heathrow Airport to Chicago?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents you'll need for your trip to Chicago 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 Chicago. 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 London Heathrow Airport to Chicago?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Chicago is Boeing 767-300, representing 44.59% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 12.46%, Boeing 777 at 12.25%, and Boeing 787-10 Dreamliner at 11.11%.
What is the most popular airline from London Heathrow Airport to Chicago?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Chicago is British Airways, representing 38% of all bookings. The subsequent popular airlines are American Airlines at 19%, Lufthansa at 11%, and Aer Lingus at 11%.

Best airlines flying from London Heathrow Airport to Chicago

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

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $451	Free Cancellation	Rating 7.0 534 reviews	Search Icelandair flights
Scandinavian Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 1,481 reviews	Search Scandinavian Airlines flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 8,944 reviews	Search United Airlines flights
Aer Lingus	PriceFrom $493	Free Cancellation	Rating 7.2 1,239 reviews	Search Aer Lingus flights
British Airways	PriceFrom $552	Free Cancellation	Rating 6.7 7,316 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 1,963 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $582	Free Cancellation	Rating 7.0 2,892 reviews	Search Iberia flights
American Airlines	PriceFrom $582	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Austrian Airlines	PriceFrom $586	Free Cancellation	Rating 7.6 836 reviews	Search Austrian Airlines flights
Finnair	PriceFrom $607	Free Cancellation	Rating 7.6 1,321 reviews	Search Finnair flights

Austrian Airlines Flights From London Heathrow Airport to Chicago
Austrian Airlines flight deals from London Heathrow Airport to Chicago start from $586 round-trip. Over the 18 Austrian Airlines flights for this route in a normal week, average airfare is usually $987 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London Heathrow Airport to Chicago
Another popular option for London Heathrow Airport to Chicago flights is Finnair (7.6/10, 1,321 ratings). Finnair flies from London Heathrow Airport to Chicago around 34 times per week, with deals starting from $607 round-trip and rising to an average price of around $809.

Merrillville

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Hammond

Benton Harbor

Saint Joseph

Lansing

Portage

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?

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

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

All flight searches from London to Chicago on momondo can be filtered to show those which offer flexible booking policies.

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?

Of course. momondo tracks the price of London to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from London Heathrow Airport to Chicago from $548

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Find the cheapest flights from London Heathrow Airport to Chicago (LHR-CHI)

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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Austrian Airlines flights from London Heathrow Airport to Chicago

Our best Austrian Airlines deals on London Heathrow Airport to Chicago flight tickets

Icelandair flights from London Heathrow Airport to Chicago

Our best Icelandair deals on London Heathrow Airport to Chicago flight tickets

momondo Fare Finder

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

See travel insights to Chicago from

How to get the cheapest flight ticket from London Heathrow Airport 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

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

What is the cheapest month to fly to Chicago?

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 Heathrow Airport 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 $932.

What is the cheapest London Heathrow to Chicago flight route?

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

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

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

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

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

How have London Heathrow Airport to Chicago flight prices changed over time?

As of August 2025, prices for London Heathrow Airport to Chicago flights are approximately 37% more expensive when compared to flights at the same time last year.

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

Aer Lingus, TAP AIR PORTUGAL, and Icelandair are the most popular carriers operating from London Heathrow to Chicago

What airlines fly to Chicago?

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

Dublin (DUB) was the most common stop: 69% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $491.

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

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 05m.

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

Reykjavik (KEF) has the shortest average layover time for this route: 1h 05m.

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

The number of flights available between London Heathrow Airport and Chicago is 50 per day as of August 2025. The most frequent departure time is 2:00PM, with 53% of daily flights leaving in the afternoon.

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

The number of flights available between London Heathrow Airport and Chicago is 354 per week as of August 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

When to book flights from London Heathrow Airport to Chicago

Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Chicago

How far is London Heathrow to Chicago by plane?

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

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

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

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

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

What is the most popular airline from London Heathrow Airport to Chicago?

Best airlines flying from London Heathrow Airport to Chicago

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

Austrian Airlines Flights From London Heathrow Airport to Chicago

Finnair Flights From London Heathrow Airport to Chicago

Traveling to a place near Chicago?

Why use momondo?

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

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

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

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

Get notified when prices go down

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