What airlines fly to Illinois?

British Airways, American Airlines and Aer Lingus 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 52% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 11 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

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

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

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

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.

$446 Cheap Flights from London Heathrow Airport to Illinois in 2025/26

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 360 per week as of September 2025. The most frequent departure day is Mon, 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 September 2025, there are 51 flights per day flying from London Heathrow Airport to Illinois. The most common time of day flights depart is 2:00PM, with 52% 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

7:25 pm - 2:00 pmLHR-ORD

24h 35m1 stop

5:50 pm - 7:55 amORD-LHR

8h 05mnonstop

$534Multiple Airlines

Find Deal

Sun, Nov 30 - Fri, Feb 20

8:30 am - 4:20 pmLHR-ORD

12h 50m1 stop

4:20 pm - 11:05 amORD-LHR

12h 45m1 stop

$535United Airlines

Find Deal

Sat, Nov 1 - Sat, Nov 8

8:20 am - 3:45 pmLHR-ORD

13h 25m1 stop

2:41 pm - 8:05 amORD-LHR

11h 24m1 stop

$536American Airlines

Find Deal

Thu, Oct 2 - Tue, Oct 7

2:10 pm - 5:20 pmLHR-ORD

9h 10mnonstop

4:00 pm - 6:20 amORD-LHR

8h 20mnonstop

$537Lufthansa

Find Deal

Tue, Oct 7 - Sun, Oct 12

12:15 pm - 5:20 pmLHR-ORD

11h 05m1 stop

6:30 pm - 7:30 pmORD-LHR

19h 00m1 stop

$541Icelandair

Find Deal

Sun, Dec 14 - Thu, Jan 15

12:15 pm - 5:20 pmLHR-ORD

11h 05m1 stop

6:30 pm - 10:50 amORD-LHR

10h 20m1 stop

$542Icelandair

Find Deal

Mon, Nov 10 - Mon, Nov 17

12:35 pm - 4:15 pmLHR-ORD

8h 40mnonstop

5:10 pm - 6:55 amORD-LHR

7h 45mnonstop

$543British Airways

Find Deal

Sat, Nov 1 - Fri, Nov 14

12:35 pm - 4:15 pmLHR-ORD

8h 40mnonstop

9:45 pm - 11:35 amORD-LHR

7h 50mnonstop

$544British Airways

Find Deal

Sat, Nov 1 - Fri, Nov 14

10:25 am - 2:45 pmLHR-ORD

9h 20mnonstop

3:45 pm - 5:55 amORD-LHR

8h 10mnonstop

$555Lufthansa

Find Deal

Tue, Oct 28 - Tue, Nov 4

11:40 am - 9:46 pmLHR-EVV

16h 06m2 stops

11:10 am - 6:25 amEVV-LHR

14h 15m2 stops

$907American Airlines

Find Deal

Thu, Mar 5 - Mon, Mar 9

United Airlines flights from London Heathrow Airport to Illinois

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

United Airlines

Sep 25

LHR7:30 amLondon Heathrow

13h 25m

1 stop

ORD2:55 pmChicago O'Hare Intl

Oct 11

ORD4:00 pmChicago O'Hare Intl

8h 20m

LHR6:20 amLondon Heathrow

$534

Find similar

United Airlines

Nov 1

LHR8:30 amLondon Heathrow

12h 50m

1 stop

ORD4:20 pmChicago O'Hare Intl

Nov 8

ORD4:20 pmChicago O'Hare Intl

12h 45m

1 stop

LHR11:05 amLondon Heathrow

$535

Find similar

United Airlines

Sep 25

LHR6:50 amLondon Heathrow

11h 15m

1 stop

ORD12:05 pmChicago O'Hare Intl

Oct 2

ORD1:00 pmChicago O'Hare Intl

14h 40m

1 stop

LHR9:40 amLondon Heathrow

$537

Find similar

British Airways flights from London Heathrow Airport to Illinois

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

British Airways

Nov 1

LHR12:35 pmLondon Heathrow

8h 40m

ORD4:15 pmChicago O'Hare Intl

Nov 14

ORD5:10 pmChicago O'Hare Intl

7h 45m

LHR6:55 amLondon Heathrow

$543

Find similar

British Airways

Nov 1

LHR12:35 pmLondon Heathrow

8h 40m

ORD4:15 pmChicago O'Hare Intl

Nov 14

ORD9:45 pmChicago O'Hare Intl

7h 50m

LHR11:35 amLondon Heathrow

$544

Find similar

British Airways

Oct 1

LHR9:50 amLondon Heathrow

11h 55m

1 stop

ORD3:45 pmChicago O'Hare Intl

Oct 22

ORD10:35 pmChicago O'Hare Intl

7h 40m

LHR12:15 pmLondon Heathrow

$547

Find similar

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

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 11/30

7:25 pm-2:00 pm

1 stop24h 35m

Chicago O'Hare Intl

Fri 2/20

5:50 pm-7:55 am

Nonstop8h 05m

$534

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 11/1

8:30 am-4:20 pm

1 stop12h 50m

Chicago O'Hare Intl

Sat 11/8

4:20 pm-11:05 am

1 stop12h 45m

$535

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 10/2

8:20 am-3:45 pm

1 stop13h 25m

Chicago O'Hare Intl

Tue 10/7

2:41 pm-8:05 am

1 stop11h 24m

$536

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/7

2:10 pm-5:20 pm

Nonstop9h 10m

Chicago O'Hare Intl

Sun 10/12

4:00 pm-6:20 am

Nonstop8h 20m

$537

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 12/14

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Thu 1/15

6:30 pm-7:30 pm

1 stop19h 00m

$541

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 11/10

12:15 pm-5:20 pm

1 stop11h 05m

Chicago O'Hare Intl

Mon 11/17

6:30 pm-10:50 am

1 stop10h 20m

$542

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 11/1

12:35 pm-4:15 pm

Nonstop8h 40m

Chicago O'Hare Intl

Fri 11/14

5:10 pm-6:55 am

Nonstop7h 45m

$543

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 11/1

12:35 pm-4:15 pm

Nonstop8h 40m

Chicago O'Hare Intl

Fri 11/14

9:45 pm-11:35 am

Nonstop7h 50m

$544

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 10/28

10:25 am-2:45 pm

Nonstop9h 20m

Chicago O'Hare Intl

Tue 11/4

3:45 pm-5:55 am

Nonstop8h 10m

$555

LondonEvansville

LHR - EVV

LHREVV

London Heathrow

Thu 3/5

11:40 am-9:46 pm

2 stops16h 06m

Evansville Dress Regional

Mon 3/9

11:10 am-6:25 am

2 stops14h 15m

$907

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 February. Flight prices, which tend to average around $596, 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 February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $602.

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 $777. Flights from London Heathrow Airport to Illinois on a Sunday will generally be more expensive and average around $924. 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 evening. Flights from London Heathrow Airport to Illinois during this time can be as low as $620. Flights in the afternoon are often more expensive with an average ticket price of $936.

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 $724 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 $693 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?

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

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	$630
Fastest flight time	8h 35m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from London Heathrow Airport in the past 72 hours is $630. The best round-trip flight deal from London Heathrow Airport to Illinois found on momondo in the last 72 hours is $750.

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

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

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

Search flight deals

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 11 operators available for flights from London Heathrow Airport to Illinois as of September 2025.
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 44.77% of all bookings. The subsequent popular models are Boeing 777 at 13.01%, Boeing 787-10 Dreamliner at 12.41%, and Boeing 787-9 Dreamliner at 6.91%.

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
Icelandair	PriceFrom $451	Free Cancellation	Rating 7.0 545 reviews	Search Icelandair flights
Aer Lingus	PriceFrom $453	Free Cancellation	Rating 7.2 1,277 reviews	Search Aer Lingus flights
Scandinavian Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 1,486 reviews	Search Scandinavian Airlines flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
British Airways	PriceFrom $553	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom $558	Free Cancellation	Rating 7.1 1,977 reviews	Search TAP AIR PORTUGAL flights
American Airlines	PriceFrom $579	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Austrian Airlines	PriceFrom $584	Free Cancellation	Rating 7.6 850 reviews	Search Austrian Airlines flights
Iberia	PriceFrom $599	Free Cancellation	Rating 7.0 2,925 reviews	Search Iberia flights
Finnair	PriceFrom $607	Free Cancellation	Rating 7.6 1,324 reviews	Search Finnair 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.

An easier way to manage your Illinois trip

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Popular cities in Illinois

Flights to New Yorkfrom $49

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Flights to Chicagofrom $49

Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

Flights to San Franciscofrom $53

Flights to Washington, D.C.from $49

Flights to Bostonfrom $62

Flights to Atlantafrom $51

Flights to Dallasfrom $68

Flights to Seattlefrom $69

Cheap flights from London Heathrow Airport to Illinois from $534

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Big names and deals

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Filter for what you want

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Find the cheapest flights from London Heathrow Airport to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

United Airlines flights from London Heathrow Airport to Illinois

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

British Airways flights from London Heathrow Airport to Illinois

Our best British Airways 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

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 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?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from London Heathrow Airport to Illinois during this time can be as low as $620. Flights in the afternoon are often more expensive with an average ticket price of $936.

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?

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?

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

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

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

What airlines fly to Illinois?

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

As of September 2025, there are 51 flights per day flying from London Heathrow Airport to Illinois. The most common time of day flights depart is 2:00PM, with 52% of flights taking off in the afternoon.

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 360 per week as of September 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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

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

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

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

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

What is the most popular plane model 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?

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

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

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

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

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