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

JetBlue, Austrian Airlines, and Virgin Atlantic are the most popular carriers operating from London Heathrow to Illinois

What airlines fly to Illinois?

British Airways, American Airlines and Lufthansa are the top three most popular airlines that fly to Illinois 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 Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

There are 9 operators available for flights from London Heathrow Airport to Illinois as of April 2026.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Illinois.

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

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$481 Cheap Flights from London Heathrow Airport to Illinois in 2026

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

The number of flights available between London Heathrow Airport and Illinois is 317 per week as of April 2026. The most frequent departure day is Thu, with 16% of weekly flights leaving on this day.

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

As of April 2026, there are 45 flights per day flying from London Heathrow Airport to Illinois. The most common time of day flights depart is 10:00AM, with 50% of flights taking off in the afternoon.

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Find the cheapest flights from London Heathrow Airport to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:05 pm - 6:15 pm

LHR

ORD

11h 10m

1 stop

7:25 pm - 11:55 am

ORD

LHR

10h 30m

1 stop

$653Icelandair

Sat, Apr 18 - Mon, May 4

1:05 pm - 9:25 pm

LHR

ORD

14h 20m

1 stop

7:25 pm - 11:55 am

ORD

LHR

10h 30m

1 stop

$654Icelandair

Fri, May 1 - Mon, May 4

4:25 pm - 7:30 pm

LHR

STL

9h 05mnonstop

4:47 pm - 9:25 am

STL

LHR

10h 38m

1 stop

$815British Airways

Wed, Sep 2 - Wed, Sep 23

10:05 am - 6:15 pm

LHR

STL

14h 10m

1 stop

9:35 pm - 11:35 am

STL

LHR

8h 00mnonstop

$817British Airways

Mon, Sep 21 - Wed, Sep 30

7:25 am - 6:19 pm

LHR

PAH

16h 54m

2 stops

5:00 am - 7:15 am

PAH

LHR

20h 15m

2 stops

$913United Airlines

Tue, May 12 - Tue, May 19

11:05 am - 6:19 pm

LHR

PAH

13h 14m

1 stop

5:00 am - 7:15 am

PAH

LHR

20h 15m

2 stops

$945United Airlines

Tue, May 12 - Tue, May 19

6:55 am - 5:06 pm

LHR

MLI

16h 11m

2 stops

6:34 pm - 11:55 am

MLI

LHR

11h 21m

1 stop

$1,252Lufthansa

Wed, Apr 15 - Tue, Jun 2

7:25 am - 5:06 pm

LHR

MLI

15h 41m

2 stops

1:15 pm - 8:40 am

MLI

LHR

13h 25m

2 stops

$1,258Lufthansa

Wed, Apr 15 - Tue, Jun 2

11:10 am - 5:53 pm

LHR

EVV

12h 43m

1 stop

5:50 pm - 12:10 pm

EVV

LHR

12h 20m

1 stop

$1,263American Airlines

Tue, May 12 - Tue, May 19

11:10 am - 5:53 pm

LHR

EVV

12h 43m

1 stop

11:03 am - 6:55 am

EVV

LHR

13h 52m

1 stop

$1,267American Airlines

Wed, May 13 - Wed, May 20

Icelandair flights from London Heathrow Airport to Illinois

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

Icelandair

Apr 18

LHR1:05 pmLondon Heathrow

11h 10m

1 stop

ORD6:15 pmChicago O'Hare Intl

May 4

ORD7:25 pmChicago O'Hare Intl

10h 30m

1 stop

LHR11:55 amLondon Heathrow

$653

Icelandair

May 1

LHR1:05 pmLondon Heathrow

14h 20m

1 stop

ORD9:25 pmChicago O'Hare Intl

May 4

ORD7:25 pmChicago O'Hare Intl

10h 30m

1 stop

LHR11:55 amLondon Heathrow

$654

Icelandair

May 7

LHR1:05 pmLondon Heathrow

11h 10m

1 stop

ORD6:15 pmChicago O'Hare Intl

May 13

ORD7:25 pmChicago O'Hare Intl

18h 55m

1 stop

LHR8:20 pmLondon Heathrow

$656

Scandinavian Airlines flights from London Heathrow Airport to Illinois

Our best Scandinavian Airlines deals on London Heathrow Airport to Illinois flight tickets

Scandinavian Airlines

Apr 14

LHR7:05 amLondon Heathrow

40h 36m

2 stops

ORD5:41 pmChicago O'Hare Intl

Apr 27

ORD7:15 pmChicago O'Hare Intl

20h 25m

1 stop

LHR9:40 pmLondon Heathrow

$779

Scandinavian Airlines

May 20

LHR7:30 pmLondon Heathrow

31h 59m

2 stops

STL9:29 pmLambert-St Louis

May 28

STL10:49 amLambert-St Louis

23h 11m

2 stops

LHR4:00 pmLondon Heathrow

$897

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 4/18

1:05 pm-6:15 pm

1 stop11h 10m

Chicago O'Hare Intl

Mon 5/4

7:25 pm-11:55 am

1 stop10h 30m

$653

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 5/1

1:05 pm-9:25 pm

1 stop14h 20m

Chicago O'Hare Intl

Mon 5/4

7:25 pm-11:55 am

1 stop10h 30m

$654

Quickest round-trip

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/2

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Wed 9/23

4:47 pm-9:25 am

1 stop10h 38m

$815

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 9/21

10:05 am-6:15 pm

1 stop14h 10m

Lambert-St Louis

Wed 9/30

9:35 pm-11:35 am

Nonstop8h 00m

$817

LondonPaducah

LHR - PAH

LHRPAH

London Heathrow

Tue 5/12

7:25 am-6:19 pm

2 stops16h 54m

Paducah Barkley Regional

Tue 5/19

5:00 am-7:15 am

2 stops20h 15m

$913

LondonPaducah

LHR - PAH

LHRPAH

London Heathrow

Tue 5/12

11:05 am-6:19 pm

1 stop13h 14m

Paducah Barkley Regional

Tue 5/19

5:00 am-7:15 am

2 stops20h 15m

$945

LondonMoline

LHR - MLI

LHRMLI

London Heathrow

Wed 4/15

6:55 am-5:06 pm

2 stops16h 11m

Moline Quad-City

Tue 6/2

6:34 pm-11:55 am

1 stop11h 21m

$1,252

LondonMoline

LHR - MLI

LHRMLI

London Heathrow

Wed 4/15

7:25 am-5:06 pm

2 stops15h 41m

Moline Quad-City

Tue 6/2

1:15 pm-8:40 am

2 stops13h 25m

$1,258

LondonEvansville

LHR - EVV

LHREVV

London Heathrow

Tue 5/12

11:10 am-5:53 pm

1 stop12h 43m

Evansville Dress Regional

Tue 5/19

5:50 pm-12:10 pm

1 stop12h 20m

$1,263

LondonEvansville

LHR - EVV

LHREVV

London Heathrow

Wed 5/13

11:10 am-5:53 pm

1 stop12h 43m

Evansville Dress Regional

Wed 5/20

11:03 am-6:55 am

1 stop13h 52m

$1,267

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 Illinois

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 Illinois?

The cheapest month to fly to Illinois from London Heathrow Airport is in September. Flight prices, which tend to average around $592, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $614.

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

The cheapest day to depart from London Heathrow Airport to Illinois is on a Friday when prices can be found for as low as $816. Flights from London Heathrow Airport to Illinois on a Monday will generally be more expensive and average around $911. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from London Heathrow Airport to Illinois during this time can be as low as $845. Flights in the afternoon are often more expensive with an average ticket price of $962.

What is the cheapest London Heathrow to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $743 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from London Heathrow Airport for as low as $621 on momondo.

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

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

You could potentially save up to 2% on your flight if you consider stops on a London Heathrow Airport to Illinois flight.

Cheap London Heathrow Airport to Illinois flight deals and tips

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

Best Price Found	$660
Fastest flight time	8h 35m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from London Heathrow Airport in the past 72 hours is $660. The best round-trip flight deal from London Heathrow Airport to Illinois found on momondo in the last 72 hours is $845.

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

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

There are 98 airports in Illinois. From London Heathrow Airport there are direct flights to Chicago O'Hare Intl (ORD), Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Illinois

When did momondo last update prices for flights from London Heathrow Airport to Illinois?
Prices for flights from London Heathrow Airport to Illinois refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Illinois?
There are 9 operators available for flights from London Heathrow Airport to Illinois as of April 2026.
How old do you have to be to fly from London Heathrow Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Illinois?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Illinois is Boeing 767-300, representing 31.02% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 23.14%, Boeing 777 at 15.29%, and Boeing 787-10 Dreamliner at 10.95%.

Best airlines flying from London Heathrow Airport to Illinois

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

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.2 1,495 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,531 reviews	Search United Airlines flights
Icelandair	PriceFrom $494	Free Cancellation	Rating 7.0 630 reviews	Search Icelandair flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 904 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $559	Free Cancellation	Rating 6.7 7,841 reviews	Search British Airways flights
American Airlines	PriceFrom $583	Free Cancellation	Rating 7.1 11,549 reviews	Search American Airlines flights
Iberia	PriceFrom $599	Free Cancellation	Rating 7.0 3,164 reviews	Search Iberia flights
Lufthansa	PriceFrom $618	Free Cancellation	Rating 6.8 7,883 reviews	Search Lufthansa flights
TAP AIR PORTUGAL	PriceFrom $653	Free Cancellation	Rating 7.1 2,187 reviews	Search TAP AIR PORTUGAL flights

Why use momondo?

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

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

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

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

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

momondo provides multiple filters to help you find the best flight to Illinois 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 Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Illinois 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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Popular cities in Illinois

Flights to New Yorkfrom $48

Flights to Los Angelesfrom $53

Flights to Orlandofrom $55

Flights to Miamifrom $55

Flights to Chicagofrom $59

Flights to San Franciscofrom $68

Flights to Las Vegasfrom $54

Flights to Washington, D.C.from $56

Flights to Bostonfrom $66

Flights to Atlantafrom $50

Flights to Dallasfrom $55

Flights to Fort Lauderdalefrom $56

Cheap flights from London Heathrow Airport to Illinois from $481

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Find the cheapest flights from London Heathrow Airport to Illinois

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Icelandair flights from London Heathrow Airport to Illinois

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

Scandinavian Airlines flights from London Heathrow Airport to Illinois

Our best Scandinavian Airlines deals on London Heathrow Airport to Illinois flight tickets

momondo Fare Finder

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

See travel insights to Illinois from

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

What is the cheapest month to fly to Illinois?

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

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

What is the cheapest London Heathrow to Illinois flight route?

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

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

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

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

What airlines fly to Illinois?

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

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

Cheap London Heathrow Airport to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from London Heathrow Airport to Illinois

Best airlines flying from London Heathrow Airport to Illinois

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

Why use momondo?

An easier way to manage your Illinois 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 Illinois

Popular cities in Illinois

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