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

Lufthansa, United Airlines, and British Airways 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 49% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 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 7 operators available for flights from London Heathrow Airport to Illinois as of June 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.

$488 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 384 per week as of June 2026. The most frequent departure day is Tue, with 15% of weekly flights leaving on this day.

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

As of June 2026, there are 54 flights per day flying from London Heathrow Airport to Illinois. The most common time of day flights depart is 11:00AM, with 51% 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 - 10:16 am

LHR

ORD

27h 11m

3 stops

9:50 am - 11:55 am

ORD

LHR

20h 05m

2 stops

$758Multiple Airlines

Wed, Jul 8 - Wed, Jul 15

8:30 am - 8:12 pm

LHR

ORD

17h 42m

2 stops

1:55 pm - 8:35 am

ORD

LHR

12h 40m

1 stop

$759Air Canada

Wed, Sep 16 - Wed, Sep 23

7:05 am - 4:10 pm

LHR

ORD

15h 05m

2 stops

7:15 pm - 6:50 pm

ORD

LHR

17h 35m

2 stops

$760Scandinavian Airlines

Wed, Oct 7 - Wed, Oct 21

11:10 am - 1:50 pm

LHR

ORD

8h 40mnonstop

10:35 pm - 12:15 pm

ORD

LHR

7h 40mnonstop

$767British Airways

Tue, Sep 1 - Fri, Sep 18

10:00 am - 7:10 pm

LHR

PAH

15h 10m

1 stop

5:00 am - 8:30 am

PAH

LHR

21h 30m

1 stop

$938United Airlines

Wed, Jul 8 - Wed, Jul 15

9:00 am - 10:14 am

LHR

MLI

31h 14m

2 stops

2:26 pm - 7:55 am

MLI

LHR

11h 29m

1 stop

$999United Airlines

Thu, Nov 5 - Mon, Nov 9

7:30 pm - 4:58 pm

LHR

PIA

27h 28m

2 stops

4:05 pm - 11:55 am

PIA

LHR

13h 50m

1 stop

$1,004Lufthansa

Tue, Jun 30 - Mon, Sep 28

7:30 pm - 4:58 pm

LHR

PIA

27h 28m

2 stops

4:05 pm - 4:40 pm

PIA

LHR

18h 35m

2 stops

$1,010Lufthansa

Tue, Jun 30 - Mon, Sep 28

8:55 am - 4:28 pm

LHR

STL

13h 33m

1 stop

9:35 pm - 11:35 am

STL

LHR

8h 00mnonstop

$1,035British Airways

Tue, Jul 7 - Tue, Jul 21

9:15 am - 4:10 pm

LHR

EVV

12h 55m

1 stop

12:26 pm - 9:00 am

EVV

LHR

14h 34m

1 stop

$1,323American Airlines

Sat, Jul 25 - Tue, Aug 4

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British Airways flights from London Heathrow Airport to Illinois

Our best British Airways deals on London Heathrow Airport to Illinois flight tickets

British Airways

Sep 1

LHR11:10 amLondon Heathrow

8h 40m

ORD1:50 pmChicago O'Hare Intl

Sep 18

ORD10:35 pmChicago O'Hare Intl

7h 40m

LHR12:15 pmLondon Heathrow

$767

British Airways

Sep 10

LHR11:10 amLondon Heathrow

8h 40m

ORD1:50 pmChicago O'Hare Intl

Sep 16

ORD9:00 pmChicago O'Hare Intl

7h 50m

LHR10:50 amLondon Heathrow

$769

British Airways

Jul 9

LHR7:40 amLondon Heathrow

12h 20m

1 stop

ORD2:00 pmChicago O'Hare Intl

Sep 8

ORD5:00 pmChicago O'Hare Intl

7h 50m

LHR6:50 amLondon Heathrow

$786

American Airlines flights from London Heathrow Airport to Illinois

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

American Airlines

Jun 22

LHR9:45 amLondon Heathrow

8h 40m

ORD12:25 pmChicago O'Hare Intl

Jun 28

ORD1:24 pmChicago O'Hare Intl

14h 16m

1 stop

LHR9:40 amLondon Heathrow

$796

American Airlines

Jun 25

LHR9:45 amLondon Heathrow

8h 40m

ORD12:25 pmChicago O'Hare Intl

Jun 29

ORD1:24 pmChicago O'Hare Intl

14h 16m

1 stop

LHR9:40 amLondon Heathrow

$797

American Airlines

Jun 25

LHR2:45 pmLondon Heathrow

8h 50m

ORD5:35 pmChicago O'Hare Intl

Jun 30

ORD1:24 pmChicago O'Hare Intl

14h 16m

1 stop

LHR9:40 amLondon Heathrow

$798

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

Wed 7/8

1:05 pm-10:16 am

3 stops27h 11m

Chicago O'Hare Intl

Wed 7/15

9:50 am-11:55 am

2 stops20h 05m

$758

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/16

8:30 am-8:12 pm

2 stops17h 42m

Chicago O'Hare Intl

Wed 9/23

1:55 pm-8:35 am

1 stop12h 40m

$759

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/7

7:05 am-4:10 pm

2 stops15h 05m

Chicago O'Hare Intl

Wed 10/21

7:15 pm-6:50 pm

2 stops17h 35m

$760

Quickest round-trip

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/1

11:10 am-1:50 pm

Nonstop8h 40m

Chicago O'Hare Intl

Fri 9/18

10:35 pm-12:15 pm

Nonstop7h 40m

$767

LondonPaducah

LHR - PAH

LHRPAH

London Heathrow

Wed 7/8

10:00 am-7:10 pm

1 stop15h 10m

Paducah Barkley Regional

Wed 7/15

5:00 am-8:30 am

1 stop21h 30m

$938

LondonMoline

LHR - MLI

LHRMLI

London Heathrow

Thu 11/5

9:00 am-10:14 am

2 stops31h 14m

Moline Quad-City

Mon 11/9

2:26 pm-7:55 am

1 stop11h 29m

$999

LondonPeoria

LHR - PIA

LHRPIA

London Heathrow

Tue 6/30

7:30 pm-4:58 pm

2 stops27h 28m

Greater Peoria

Mon 9/28

4:05 pm-11:55 am

1 stop13h 50m

$1,004

LondonPeoria

LHR - PIA

LHRPIA

London Heathrow

Tue 6/30

7:30 pm-4:58 pm

2 stops27h 28m

Greater Peoria

Mon 9/28

4:05 pm-4:40 pm

2 stops18h 35m

$1,010

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 7/7

8:55 am-4:28 pm

1 stop13h 33m

Lambert-St Louis

Tue 7/21

9:35 pm-11:35 am

Nonstop8h 00m

$1,035

LondonEvansville

LHR - EVV

LHREVV

London Heathrow

Sat 7/25

9:15 am-4:10 pm

1 stop12h 55m

Evansville Dress Regional

Tue 8/4

12:26 pm-9:00 am

1 stop14h 34m

$1,323

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 June. Flight prices, which tend to average around $124, 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 June, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $374.

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 Wednesday when prices can be found for as low as $864. Flights from London Heathrow Airport to Illinois on a Saturday will generally be more expensive and average around $993. 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 at noon. Flights from London Heathrow Airport to Illinois during this time can be as low as $900. Flights in the afternoon are often more expensive with an average ticket price of $992.

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 from London Heathrow Airport 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 $813 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 $698 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow Airport 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 1% 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	$668
Fastest flight time	8h 40m
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 $668. The best round-trip flight deal from London Heathrow Airport to Illinois found on momondo in the last 72 hours is $980.

The fastest flight from London Heathrow Airport to Illinois takes 8h 40m

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).

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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 7 operators available for flights from London Heathrow Airport to Illinois as of June 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 30.76% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 22.79%, Boeing 777 at 15.26%, and Boeing 787-10 Dreamliner at 10.34%.

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 7.3 1,603 reviews	Search Aer Lingus flights
Scandinavian Airlines	PriceFrom $467	Free Cancellation	Rating 7.4 1,828 reviews	Search Scandinavian Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 935 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom $556	Free Cancellation	Rating 7.4 9,830 reviews	Search United Airlines flights
British Airways	PriceFrom $574	Free Cancellation	Rating 6.7 8,050 reviews	Search British Airways flights
American Airlines	PriceFrom $583	Free Cancellation	Rating 7.1 11,661 reviews	Search American Airlines flights
Lufthansa	PriceFrom $618	Free Cancellation	Rating 6.8 8,061 reviews	Search Lufthansa 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 $83

Flights to Los Angelesfrom $69

Flights to Miamifrom $76

Flights to Orlandofrom $65

Flights to Chicagofrom $58

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $50

Flights to Washington, D.C.from $56

Flights to Bostonfrom $83

Flights to Atlantafrom $50

Flights to Dallasfrom $87

Flights to Fort Lauderdalefrom $55

Cheap flights from London Heathrow Airport to Illinois from $488

Find the cheapest flights from London Heathrow Airport to Illinois

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British Airways flights from London Heathrow Airport to Illinois

Our best British Airways deals on London Heathrow Airport to Illinois flight tickets

American Airlines flights from London Heathrow Airport to Illinois

Our best American 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 from London Heathrow Airport to Illinois?

What cabin class options are available on London Heathrow Airport 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

Popular flights according to clicks in the last 7 days on momondo

London Heathrow Airport flight routes

According to popular flight searches on momondo this year

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