What airlines fly to London Heathrow Airport?

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from Illinois according to our data. British Airways is the first choice among our users, with 50% 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.

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

Delta, Virgin Atlantic, and KLM are the most popular carriers operating from Illinois to London Heathrow

How long does it take to fly to London Heathrow Airport?

On average, it takes 9h 35m to fly from Illinois to London Heathrow Airport if you fly out of Chicago (the most popular airport in Illinois) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Peoria and into London Heathrow Airport, then the flight time is around 11h 04m.

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

As of June 2026, there are 57 flights per day flying from Illinois to London Heathrow Airport. The most common time of day flights depart is 6:00PM, with 78% of flights taking off in the evening.

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

404 flights are operational weekly from Illinois to London Heathrow Airport as of June 2026. The most popular departure day for this route is Wed, with 15% of flights per week taking off on this day.

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

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

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

As of June 2026, there are 17 operators available to choose from for flights from Illinois to London Heathrow Airport.

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

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 Illinois 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.

$325 Cheap Flights from Illinois to London Heathrow Airport in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:09 am - 11:20 am

MLI

LHR

18h 11m

1 stop

9:55 am - 10:24 pm

LHR

MLI

18h 29m

2 stops

$875Delta

Wed, Sep 23 - Wed, Sep 30

11:09 am - 11:20 am

MLI

LHR

18h 11m

1 stop

9:55 am - 10:24 pm

LHR

MLI

18h 29m

2 stops

$876Delta

Wed, Sep 23 - Wed, Sep 30

6:00 am - 6:25 am

MLI

LHR

18h 25m

1 stop

6:30 am - 4:29 pm

LHR

MLI

15h 59m

2 stops

$877KLM

Wed, Sep 23 - Wed, Sep 30

11:09 am - 10:20 am

MLI

LHR

17h 11m

2 stops

9:55 am - 10:24 pm

LHR

MLI

18h 29m

2 stops

$880Delta

Wed, Sep 23 - Wed, Sep 30

12:08 pm - 10:55 am

MLI

LHR

16h 47m

1 stop

12:55 pm - 11:18 pm

LHR

MLI

16h 23m

1 stop

$894Multiple Airlines

Wed, Sep 23 - Wed, Sep 30

6:00 am - 6:50 am

MLI

LHR

18h 50m

1 stop

12:55 pm - 11:18 pm

LHR

MLI

16h 23m

1 stop

$895Multiple Airlines

Wed, Sep 23 - Wed, Sep 30

1:19 pm - 10:15 am

BMI

LHR

14h 56m

2 stops

3:15 pm - 12:03 am

LHR

BMI

14h 48m

1 stop

$907British Airways

Mon, Sep 28 - Sun, Oct 4

10:56 am - 6:25 am

MDW

LHR

13h 29m

1 stop

8:40 am - 6:05 pm

LHR

MDW

15h 25m

2 stops

$917KLM

Sat, Sep 5 - Tue, Sep 8

5:00 pm - 6:50 am

ORD

LHR

7h 50mnonstop

9:15 am - 4:06 pm

LHR

ORD

12h 51m

1 stop

$919British Airways

Wed, Sep 23 - Thu, Oct 8

7:15 pm - 4:00 pm

ORD

LHR

14h 45m

1 stop

6:40 am - 4:10 pm

LHR

ORD

15h 30m

1 stop

$920Scandinavian Airlines

Wed, Sep 2 - Thu, Sep 10

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JetBlue flights from Illinois to London Heathrow Airport

Our best JetBlue deals on Illinois to London Heathrow Airport flight tickets

JetBlue

Aug 7

ORD10:56 amChicago O'Hare Intl

13h 34m

1 stop

LHR6:30 amLondon Heathrow

Aug 20

LHR8:15 amLondon Heathrow

19h 40m

1 stop

ORD9:55 pmChicago O'Hare Intl

$944

JetBlue

Jun 23

ORD6:00 amChicago O'Hare Intl

21h 30m

1 stop

LHR9:30 amLondon Heathrow

Aug 22

LHR8:40 amLondon Heathrow

31h 19m

1 stop

ORD9:59 amChicago O'Hare Intl

$1,079

JetBlue

Jun 23

ORD6:00 amChicago O'Hare Intl

21h 30m

1 stop

LHR9:30 amLondon Heathrow

Aug 27

LHR11:55 amLondon Heathrow

34h 20m

1 stop

ORD4:15 pmChicago O'Hare Intl

$1,082

TAP AIR PORTUGAL flights from Illinois to London Heathrow Airport

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

TAP AIR PORTUGAL

Jul 8

ORD4:40 pmChicago O'Hare Intl

16h 55m

1 stop

LHR3:35 pmLondon Heathrow

Jul 16

LHR4:35 pmLondon Heathrow

29h 25m

1 stop

ORD4:00 pmChicago O'Hare Intl

$948

TAP AIR PORTUGAL

Jun 13

ORD6:05 pmChicago O'Hare Intl

34h 15m

1 stop

LHR10:20 amLondon Heathrow

Jun 17

LHR7:50 pmLondon Heathrow

22h 50m

1 stop

ORD12:40 pmChicago O'Hare Intl

$1,084

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

11:09 am-11:20 am

1 stop18h 11m

London Heathrow

Wed 9/30

9:55 am-10:24 pm

2 stops18h 29m

$875

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

11:09 am-11:20 am

1 stop18h 11m

London Heathrow

Wed 9/30

9:55 am-10:24 pm

2 stops18h 29m

$876

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

6:00 am-6:25 am

1 stop18h 25m

London Heathrow

Wed 9/30

6:30 am-4:29 pm

2 stops15h 59m

$877

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

11:09 am-10:20 am

2 stops17h 11m

London Heathrow

Wed 9/30

9:55 am-10:24 pm

2 stops18h 29m

$880

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

12:08 pm-10:55 am

1 stop16h 47m

London Heathrow

Wed 9/30

12:55 pm-11:18 pm

1 stop16h 23m

$894

MolineLondon

MLI - LHR

MLILHR

Moline Quad-City

Wed 9/23

6:00 am-6:50 am

1 stop18h 50m

London Heathrow

Wed 9/30

12:55 pm-11:18 pm

1 stop16h 23m

$895

BloomingtonLondon

BMI - LHR

BMILHR

Bloomington-Normal

Mon 9/28

1:19 pm-10:15 am

2 stops14h 56m

London Heathrow

Sun 10/4

3:15 pm-12:03 am

1 stop14h 48m

$907

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sat 9/5

10:56 am-6:25 am

1 stop13h 29m

London Heathrow

Tue 9/8

8:40 am-6:05 pm

2 stops15h 25m

$917

Quickest round-trip

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/23

5:00 pm-6:50 am

Nonstop7h 50m

London Heathrow

Thu 10/8

9:15 am-4:06 pm

1 stop12h 51m

$919

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/2

7:15 pm-4:00 pm

1 stop14h 45m

London Heathrow

Thu 9/10

6:40 am-4:10 pm

1 stop15h 30m

$920

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 Illinois 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

Other information

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

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Illinois, with most prices found around $200. If you’re not able to fly to London Heathrow Airport in January, then February is your next best option. Flight prices from Illinois to London Heathrow Airport during February average around $349.

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 $795. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,025.

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 Illinois to London Heathrow Airport in the evening for as low as $884. 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 $898.

What is the cheapest Illinois to London Heathrow flight route?

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

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

You are more likely to see cheaper flights to London Heathrow Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $814 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 Illinois for as low as $718 on momondo.

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

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

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

Cheap Illinois to London Heathrow Airport flight deals and tips

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

Best Price Found	$503
Fastest flight time	7h 40m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Illinois in the past 72 hours is $503. The best round-trip flight deal from Illinois to London Heathrow Airport found on momondo in the last 72 hours is $1,092.

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

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

Search flight deals

Frequently asked questions about flying from Illinois to London Heathrow Airport

When did momondo last update prices for flights from Illinois to London Heathrow Airport?
Prices for flights from Illinois to London Heathrow Airport were last updated today.
How many operators does momondo search for flights from Illinois to London Heathrow Airport?
As of June 2026, there are 17 operators available to choose from for flights from Illinois to London Heathrow Airport.
How old do you have to be to fly from Illinois to London Heathrow Airport?
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 Illinois 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 Illinois to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Illinois to London Heathrow Airport is Boeing 787-9 Dreamliner (38.68% of total bookings). The next most popular plane models are Boeing 767-300 (24.10%), Boeing 787-10 Dreamliner (19.96%), and Boeing 777 (9.46%).

Best airlines flying from Illinois to London Heathrow Airport

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

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $51	Free Cancellation	Rating 7.1 2,981 reviews	Search JetBlue flights
Scandinavian Airlines	PriceFrom $384	Free Cancellation	Rating 7.4 1,821 reviews	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	PriceFrom $428	Free Cancellation	Rating 7.2 2,272 reviews	Search TAP AIR PORTUGAL flights
SWISS	PriceFrom $458	Free Cancellation	Rating 7.5 1,969 reviews	Search SWISS flights
Icelandair	PriceFrom $481	Free Cancellation	Rating 7.0 674 reviews	Search Icelandair flights
Finnair	PriceFrom $516	Free Cancellation	Rating 7.7 1,408 reviews	Search Finnair flights
British Airways	PriceFrom $521	Free Cancellation	Rating 6.7 8,047 reviews	Search British Airways flights
Alaska Airlines	PriceFrom $522	Free Cancellation	Rating 7.9 12,501 reviews	Search Alaska Airlines flights
Iberia	PriceFrom $567	Free Cancellation	Rating 7.0 3,232 reviews	Search Iberia flights
Aer Lingus	PriceFrom $568	Free Cancellation	Rating 7.3 1,603 reviews	Search Aer Lingus flights

Hounslow

Gatwick

Milton Keynes

Luton

Dover

Hayes

Crawley

Croydon

Wembley

Stansted

Stratford-upon-Avon

Harrow

Slough

Brentwood

Watford

Cobham

Guildford

Folkestone

Uxbridge

Romford

Why use momondo?

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

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

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

Yes. momondo allows you to filter the results for Illinois to London flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Illinois.

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

Yes. momondo can track prices for Illinois to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to London Gatwick Airportfrom $379

Flights to London Stansted Airportfrom $485

Flights to London City Airportfrom $610

Flights to London Luton Airportfrom $442

Flights to Glasgow Intl Airportfrom $518

Flights to London Southend Airportfrom $649

Flights to Belfast Intl Airportfrom $691

Flights to Belfast City Airportfrom $711

Cheap flights from Illinois to London from $320

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to London departing on 9/16. 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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JetBlue flights from Illinois to London Heathrow Airport

Our best JetBlue deals on Illinois to London Heathrow Airport flight tickets

TAP AIR PORTUGAL flights from Illinois to London Heathrow Airport

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

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from Illinois to 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?

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

What is the cheapest Illinois to London Heathrow flight route?

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

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

Can stopping save me money on Illinois to London Heathrow Airport flights?

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

What airlines fly to London Heathrow Airport?

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

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

How long does it take to fly to London Heathrow Airport?

Cheap Illinois to London Heathrow Airport flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Illinois to London Heathrow Airport

Best airlines flying from Illinois to London Heathrow Airport

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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport 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.

Find better results for your trip to London

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According to popular flight searches on momondo this year

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List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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