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

As of December 2025, there are 42 flights per day flying from Chicago to London Heathrow Airport. The most common time of day flights depart is 9:00PM, with 62% of flights taking off in the evening.

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

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

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

United Airlines, Austrian Airlines, and Scandinavian Airlines are the most popular carriers operating from Chicago to London Heathrow

What airlines fly to London Heathrow Airport?

British Airways, Iberia and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from Chicago according to our data. British Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 16 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

Dublin (DUB) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

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

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

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

Dublin (DUB) has the shortest average layover time for this route: 1h 15m.

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.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 57m.

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

As of December 2025, there are 297 flights per week flying from Chicago to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

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 at night have, in the past, seen delays more frequently in comparison.

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

Prices for flights from Chicago to London Heathrow Airport refresh daily.

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

The number of operators available for flights from Chicago to London Heathrow Airport is 16 as of December 2025.

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

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 Chicago to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

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

$370 Cheap Flights from Chicago to London Heathrow Airport in 2025/26

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7:01 am - 9:20 am

ORD

LHR

20h 19m2 stops

10:20 am - 4:45 pm

LHR

ORD

12h 25m1 stop

$556Scandinavian Airlines

vie., ene. 23 - sáb., ene. 31

7:25 pm - 8:20 pm

ORD

LHR

18h 55m1 stop

9:25 pm - 9:40 pm

LHR

ORD

30h 15m1 stop

$557Icelandair

jue., may. 7 - dom., jun. 14

8:20 pm - 5:40 pm

ORD

LHR

16h 20m1 stop

7:50 pm - 5:45 pm

LHR

ORD

26h 55m2 stops

$558Scandinavian Airlines

lun., mar. 9 - mar., mar. 24

8:20 pm - 4:25 pm

ORD

LHR

15h 05m2 stops

3:35 pm - 5:45 pm

LHR

ORD

31h 10m2 stops

$559Scandinavian Airlines

mié., mar. 18 - dom., mar. 22

7:25 pm - 11:55 am

ORD

LHR

10h 30m1 stop

1:05 pm - 6:15 pm

LHR

ORD

11h 10m1 stop

$560Icelandair

jue., abr. 23 - mié., abr. 29

7:20 pm - 5:40 pm

ORD

LHR

16h 20m1 stop

10:20 am - 4:45 pm

LHR

ORD

12h 25m1 stop

$561Scandinavian Airlines

jue., feb. 19 - lun., mar. 2

9:50 am - 7:05 am

MDW

LHR

15h 15m1 stop

6:30 am - 5:29 pm

LHR

MDW

16h 59m2 stops

$636Virgin Atlantic

mié., ene. 7 - mié., ene. 21

11:21 am - 8:45 am

MDW

LHR

15h 24m2 stops

6:30 am - 5:29 pm

LHR

MDW

16h 59m2 stops

$640Virgin Atlantic

mié., ene. 7 - mié., ene. 21

1:49 pm - 7:05 am

MDW

LHR

11h 16m1 stop

11:05 am - 6:36 pm

LHR

MDW

13h 31m1 stop

$653KLM

mié., ene. 21 - mié., ene. 28

11:48 am - 7:05 am

MDW

LHR

13h 17m1 stop

11:05 am - 6:32 pm

LHR

MDW

13h 27m1 stop

$655Delta

mié., dic. 31 - vie., ene. 9

TAP AIR PORTUGAL flights from Chicago to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on Chicago to London Heathrow Airport flight tickets

TAP AIR PORTUGAL

Jan 16

ORD8:15 pmChicago O'Hare Intl

15h 15m

1 stop

LHR5:30 pmLondon Heathrow

Feb 1

LHR6:00 amLondon Heathrow

14h 45m

1 stop

ORD2:45 pmChicago O'Hare Intl

$573

Find similar

TAP AIR PORTUGAL

Jan 16

ORD8:15 pmChicago O'Hare Intl

15h 15m

1 stop

LHR5:30 pmLondon Heathrow

Jan 23

LHR6:00 amLondon Heathrow

15h 25m

1 stop

ORD3:25 pmChicago O'Hare Intl

$576

Find similar

TAP AIR PORTUGAL

Apr 4

ORD6:15 pmChicago O'Hare Intl

12h 30m

1 stop

LHR12:45 pmLondon Heathrow

Apr 10

LHR8:00 amLondon Heathrow

14h 00m

1 stop

ORD4:00 pmChicago O'Hare Intl

$593

Find similar

Delta flights from Chicago to London Heathrow Airport

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

Delta

Dec 10

ORD9:49 amChicago O'Hare Intl

14h 36m

1 stop

LHR6:25 amLondon Heathrow

Dec 16

LHR6:20 amLondon Heathrow

14h 50m

1 stop

ORD3:10 pmChicago O'Hare Intl

$626

Find similar

Delta

Dec 10

MDW5:29 pmChicago Midway

12h 11m

1 stop

LHR11:40 amLondon Heathrow

Dec 16

LHR6:30 amLondon Heathrow

17h 30m

2 stops

MDW6:00 pmChicago Midway

$630

Find similar

Delta

Apr 8

MDW7:20 pmChicago Midway

11h 50m

1 stop

LHR1:10 pmLondon Heathrow

Apr 15

LHR8:40 amLondon Heathrow

15h 51m

2 stops

MDW6:31 pmChicago Midway

$651

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momondo Fare Finder

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

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Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

vie. 1/23

7:01 am-9:20 am

2 stops20h 19m

London Heathrow

sáb. 1/31

10:20 am-4:45 pm

1 stop12h 25m

$556

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 5/7

7:25 pm-8:20 pm

1 stop18h 55m

London Heathrow

dom. 6/14

9:25 pm-9:40 pm

1 stop30h 15m

$557

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

lun. 3/9

8:20 pm-5:40 pm

1 stop16h 20m

London Heathrow

mar. 3/24

7:50 pm-5:45 pm

2 stops26h 55m

$558

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

mié. 3/18

8:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

dom. 3/22

3:35 pm-5:45 pm

2 stops31h 10m

$559

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 4/23

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

mié. 4/29

1:05 pm-6:15 pm

1 stop11h 10m

$560

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

jue. 2/19

7:20 pm-5:40 pm

1 stop16h 20m

London Heathrow

lun. 3/2

10:20 am-4:45 pm

1 stop12h 25m

$561

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

mié. 1/7

9:50 am-7:05 am

1 stop15h 15m

London Heathrow

mié. 1/21

6:30 am-5:29 pm

2 stops16h 59m

$636

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

mié. 1/7

11:21 am-8:45 am

2 stops15h 24m

London Heathrow

mié. 1/21

6:30 am-5:29 pm

2 stops16h 59m

$640

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

mié. 1/21

1:49 pm-7:05 am

1 stop11h 16m

London Heathrow

mié. 1/28

11:05 am-6:36 pm

1 stop13h 31m

$653

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

mié. 12/31

11:48 am-7:05 am

1 stop13h 17m

London Heathrow

vie. 1/9

11:05 am-6:32 pm

1 stop13h 27m

$655

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How to get the cheapest flight ticket from Chicago to London Heathrow Airport

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 Chicago and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $646. If you’re not able to fly to London Heathrow Airport in October, then January is your next best option. Flight prices from Chicago to London Heathrow Airport during January average around $654.

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

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $771. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $915.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Chicago to London Heathrow Airport in the evening for as low as $804. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $830.

What is the cheapest Chicago to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $796 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago for as low as $701 on momondo.

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

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

You could potentially save up to 9% on your flight if you consider stops on a Chicago to London Heathrow Airport flight.

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

As of December 2025, prices for Chicago to London Heathrow Airport flights are approximately 4% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to London Heathrow Airport

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

Estimated round-trip price

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

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

Best Price Found	$443
Fastest flight time	7h 40m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Chicago in the past 72 hours is $443. The best round-trip flight deal from Chicago to London Heathrow Airport found on momondo in the last 72 hours is $677.

The fastest flight from Chicago to London Heathrow Airport takes 7h 40m

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

Search flight deals

How far is Chicago to London Heathrow by plane?
There are 3933.5 mi between Chicago and London Heathrow. A reasonable flight in good conditions will take 8h 10m.
When did momondo last update prices for flights from Chicago to London Heathrow Airport?
Prices for flights from Chicago to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Chicago to London Heathrow Airport?
The number of operators available for flights from Chicago to London Heathrow Airport is 16 as of December 2025.
How old do you have to be to fly from Chicago to London Heathrow Airport?
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 Chicago to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport 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 Heathrow Airport. 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 to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago to London Heathrow Airport is Boeing 787-9 Dreamliner (38.47% of total bookings). The next most popular plane models are Boeing 767-300 (19.55%), Boeing 787-10 Dreamliner (16.82%), and Boeing 777 (13.77%).
What is the most popular airline from Chicago to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to London Heathrow Airport is British Airways (32% of total bookings). The next most popular airlines are Iberia (19%), United Airlines (16%), and American Airlines (13%).

Best airlines flying from Chicago to London Heathrow Airport

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

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $51	Free Cancellation	Rating 7.2 2,899 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,808 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $338	Free Cancellation	Rating 7.4 1,602 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $345	Free Cancellation	Rating 7.9 8,009 reviews	Search Delta flights
TAP AIR PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.1 2,086 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $460	Free Cancellation	Rating 6.8 7,619 reviews	Search Lufthansa flights
Icelandair	PriceFrom $481	Free Cancellation	Rating 7.0 588 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $505	Free Cancellation	Rating 7.2 1,389 reviews	Search Aer Lingus flights
Alaska Airlines	PriceFrom $522	Free Cancellation	Rating 8.0 11,423 reviews	Search Alaska Airlines flights
Finnair	PriceFrom $540	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights

Alaska Airlines Flights From Chicago to London Heathrow Airport
Alaska Airlines operates around 24 flights from Chicago to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $919, but momondo users have found Alaska Airlines deals from Chicago to London Heathrow Airport from as low as $522 round-trip. Alaska Airlines has been scored 8.0/10 in 11,420 reviews.
Finnair Flights From Chicago to London Heathrow Airport
Finnair (7.6/10 from 1,334 reviews) operates around 24 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $783, with deals from around $540 rare but found on momondo. Referenced prices are for round-trip Chicago to London Heathrow Airport flight searches in the last 72 hours.

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Stratford-upon-Avon

Crawley

Brentwood

Salisbury

Wembley

Romford

Watford

Ilford

Cobham

Folkestone

Uxbridge

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Chicago.

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

Flights from Chicago to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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Cheap flights from Chicago to London from $370

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to London departing on 4/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Chicago to London Heathrow Airport

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 Chicago and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

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

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $771. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $915.

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

What is the cheapest Chicago to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

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

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

You could potentially save up to 9% on your flight if you consider stops on a Chicago to London Heathrow Airport flight.

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

As of December 2025, prices for Chicago to London Heathrow Airport flights are approximately 4% cheaper when compared to flights at the same time last year.

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

United Airlines, Austrian Airlines, and Scandinavian Airlines are the most popular carriers operating from Chicago to London Heathrow

What airlines fly to London Heathrow Airport?

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 at night have, in the past, seen delays more frequently in comparison.

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

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

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

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

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

Dublin (DUB) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 57m.

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

Dublin (DUB) has the shortest average layover time for this route: 1h 15m.

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

As of December 2025, there are 42 flights per day flying from Chicago to London Heathrow Airport. The most common time of day flights depart is 9:00PM, with 62% of flights taking off in the evening.

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

As of December 2025, there are 297 flights per week flying from Chicago to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

When to book flights from Chicago to London Heathrow Airport

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

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

Best Price Found

Fastest flight time

Direct flights

How far is Chicago to London Heathrow by plane?

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

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

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

What documentation or ID do you need to fly to London Heathrow Airport?

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

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

Best airlines flying from Chicago to London Heathrow Airport

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

Alaska Airlines Flights From Chicago to London Heathrow Airport

Finnair Flights From Chicago to London Heathrow Airport

Traveling to a place near London?

Why use momondo?