What airlines fly to Illinois?

British Airways, American Airlines and Lufthansa are the top three most popular airlines that fly to Illinois from London 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 flights depart from London to Illinois on average per day?

The number of flights available between London and Illinois is 49 per day as of May 2026. The most frequent departure time is 2:00PM, with 54% of daily flights leaving in the afternoon.

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

The number of flights available between London and Illinois is 343 per week as of May 2026. The most frequent departure day is Sun, with 17% of weekly flights leaving on this day.

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

SWISS, Lufthansa, and United Airlines are the most popular carriers operating from London to Illinois

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

Prices for flights from London to Illinois refresh daily.

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

The number of operators available for flights from London to Illinois is 9 as of May 2026.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London 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 to Illinois in 2026

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Find the cheapest flights from London 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 - 8:20 pm

ORD

LHR

18h 55m

1 stop

$693Icelandair

Tue, Sep 22 - Tue, Sep 29

1:00 pm - 9:25 pm

LGW

ORD

14h 25m

1 stop

10:25 pm - 2:40 pm

ORD

LGW

10h 15m

1 stop

$696Icelandair

Tue, Sep 1 - Tue, Sep 8

7:10 pm - 9:25 pm

LTN

ORD

32h 15m

2 stops

7:25 pm - 10:35 pm

ORD

LTN

21h 10m

2 stops

$696Multiple Airlines

Tue, Jun 16 - Wed, Jun 24

1:05 pm - 9:25 pm

LHR

ORD

14h 20m

1 stop

10:25 pm - 8:20 pm

ORD

LHR

15h 55m

1 stop

$697Icelandair

Tue, Sep 1 - Tue, Sep 8

4:25 pm - 6:15 pm

LGW

ORD

31h 50m

2 stops

7:25 pm - 8:30 am

ORD

LGW

31h 05m

3 stops

$698Multiple Airlines

Fri, Jun 5 - Sun, Jun 14

9:15 am - 3:55 pm

LCY

ORD

12h 40m

1 stop

7:05 pm - 12:35 pm

ORD

LCY

11h 30m

1 stop

$789SWISS

Mon, Sep 21 - Mon, Oct 19

9:15 am - 3:55 pm

LCY

ORD

12h 40m

1 stop

7:05 pm - 12:35 pm

ORD

LCY

11h 30m

1 stop

$792SWISS

Tue, Sep 1 - Mon, Sep 14

6:30 am - 4:27 pm

LHR

MDW

15h 57m

2 stops

5:25 pm - 11:20 am

MDW

LHR

11h 55m

1 stop

$844Delta

Wed, Sep 16 - Wed, Oct 7

6:30 am - 4:27 pm

LHR

MDW

15h 57m

2 stops

1:05 pm - 6:25 am

MDW

LHR

11h 20m

1 stop

$845Delta

Wed, Sep 16 - Wed, Oct 7

9:15 am - 5:20 pm

LHR

STL

14h 05m

1 stop

6:13 pm - 12:10 pm

STL

LHR

11h 57m

1 stop

$1,041British Airways

Wed, Jun 3 - Mon, Jun 15

Icelandair flights from London to Illinois

Our best Icelandair deals on London to Illinois flight tickets

Icelandair

Sep 1

LGW1:00 pmLondon Gatwick

11h 15m

1 stop

ORD6:15 pmChicago O'Hare Intl

Sep 8

ORD7:25 pmChicago O'Hare Intl

13h 15m

1 stop

LGW2:40 pmLondon Gatwick

$693

Icelandair

Sep 22

LHR9:25 pmLondon Heathrow

26h 50m

1 stop

ORD6:15 pmChicago O'Hare Intl

Sep 29

ORD7:25 pmChicago O'Hare Intl

10h 30m

1 stop

LHR11:55 amLondon Heathrow

$695

Icelandair

Sep 1

LGW1:00 pmLondon Gatwick

14h 25m

1 stop

ORD9:25 pmChicago O'Hare Intl

Sep 8

ORD10:25 pmChicago O'Hare Intl

10h 15m

1 stop

LGW2:40 pmLondon Gatwick

$696

SWISS flights from London to Illinois

Our best SWISS deals on London to Illinois flight tickets

SWISS

Sep 21

LCY9:15 amLondon City

12h 40m

1 stop

ORD3:55 pmChicago O'Hare Intl

Oct 19

ORD7:05 pmChicago O'Hare Intl

11h 30m

1 stop

LCY12:35 pmLondon City

$789

SWISS

Sep 1

LCY9:15 amLondon City

12h 40m

1 stop

ORD3:55 pmChicago O'Hare Intl

Sep 14

ORD7:05 pmChicago O'Hare Intl

11h 30m

1 stop

LCY12:35 pmLondon City

$792

SWISS

Sep 1

LCY9:15 amLondon City

12h 40m

1 stop

ORD3:55 pmChicago O'Hare Intl

Sep 14

ORD7:05 pmChicago O'Hare Intl

11h 30m

1 stop

LCY12:35 pmLondon City

$793

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/22

1:05 pm-6:15 pm

1 stop11h 10m

Chicago O'Hare Intl

Tue 9/29

7:25 pm-8:20 pm

1 stop18h 55m

$693

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 9/1

1:00 pm-9:25 pm

1 stop14h 25m

Chicago O'Hare Intl

Tue 9/8

10:25 pm-2:40 pm

1 stop10h 15m

$696

LondonChicago

LTN - ORD

LTNORD

London Luton

Tue 6/16

7:10 pm-9:25 pm

2 stops32h 15m

Chicago O'Hare Intl

Wed 6/24

7:25 pm-10:35 pm

2 stops21h 10m

$696

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/1

1:05 pm-9:25 pm

1 stop14h 20m

Chicago O'Hare Intl

Tue 9/8

10:25 pm-8:20 pm

1 stop15h 55m

$697

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 6/5

4:25 pm-6:15 pm

2 stops31h 50m

Chicago O'Hare Intl

Sun 6/14

7:25 pm-8:30 am

3 stops31h 05m

$698

Quickest round-trip

LondonChicago

LCY - ORD

LCYORD

London City

Mon 9/21

9:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Mon 10/19

7:05 pm-12:35 pm

1 stop11h 30m

$789

LondonChicago

LCY - ORD

LCYORD

London City

Tue 9/1

9:15 am-3:55 pm

1 stop12h 40m

Chicago O'Hare Intl

Mon 9/14

7:05 pm-12:35 pm

1 stop11h 30m

$792

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 9/16

6:30 am-4:27 pm

2 stops15h 57m

Chicago Midway

Wed 10/7

5:25 pm-11:20 am

1 stop11h 55m

$844

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Wed 9/16

6:30 am-4:27 pm

2 stops15h 57m

Chicago Midway

Wed 10/7

1:05 pm-6:25 am

1 stop11h 20m

$845

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 6/3

9:15 am-5:20 pm

1 stop14h 05m

Lambert-St Louis

Mon 6/15

6:13 pm-12:10 pm

1 stop11h 57m

$1,041

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 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 is in September. Flight prices, which tend to average around $560, 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 November is also cheap. Prices for this month can be found on momondo for an average of $646.

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

The cheapest day to depart from London to Illinois is on a Friday when prices can be found for as low as $842. Flights from London to Illinois on a Saturday will generally be more expensive and average around $925. 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 to Illinois during this time can be as low as $874. Flights in the afternoon are often more expensive with an average ticket price of $955.

What is the cheapest London to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $771 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from London for as low as $602 on momondo.

Can stopping save me money on London to Illinois flights?

You could potentially save up to 19% on your flight if you consider stops on a London to Illinois flight.

Cheap London to Illinois flight deals and tips

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

Best Price Found	$718
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from London in the past 72 hours is $718. The best round-trip flight deal from London to Illinois found on momondo in the last 72 hours is $921.

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

Direct flights go from London to Illinois every day.

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

Search flight deals

Frequently asked questions about flying from London to Illinois

When did momondo last update prices for flights from London to Illinois?
Prices for flights from London to Illinois refresh daily.
How many operators does momondo search for flights from London to Illinois?
The number of operators available for flights from London to Illinois is 9 as of May 2026.
How old do you have to be to fly from London to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London 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 to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London to Illinois is Boeing 767-300 (32.09% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (21.73%), Boeing 777 (15.97%), and Boeing 787-10 Dreamliner (10.41%).

Best airlines flying from London to Illinois

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

Airline	Rating	Free Cancellation	Price
Aer Lingus	PriceFrom $446	Free Cancellation	Rating 7.3 1,540 reviews	Search Aer Lingus flights
Icelandair	PriceFrom $468	Free Cancellation	Rating 7.0 650 reviews	Search Icelandair flights
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 9,682 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $530	Free Cancellation	Rating 7.6 911 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $559	Free Cancellation	Rating 6.7 7,943 reviews	Search British Airways flights
American Airlines	PriceFrom $595	Free Cancellation	Rating 7.1 11,673 reviews	Search American Airlines flights
Lufthansa	PriceFrom $618	Free Cancellation	Rating 6.8 7,972 reviews	Search Lufthansa flights
TAP AIR PORTUGAL	PriceFrom $653	Free Cancellation	Rating 7.2 2,230 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $667	Free Cancellation	Rating 7.0 3,208 reviews	Search Iberia flights

Why use momondo?

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

It is quick and easy to find London to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

Flights from London to Illinois 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 London to Illinois?

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 Illinois from London.

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 $71

Flights to Los Angelesfrom $51

Flights to Orlandofrom $52

Flights to Miamifrom $50

Flights to Chicagofrom $69

Flights to San Franciscofrom $76

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $92

Flights to Atlantafrom $50

Flights to Dallasfrom $76

Flights to Fort Lauderdalefrom $52

Cheap flights from London to Illinois from $468

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Illinois departing on 5/31. 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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Find the cheapest flights from London to Illinois

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Icelandair flights from London to Illinois

Our best Icelandair deals on London to Illinois flight tickets

SWISS flights from London to Illinois

Our best SWISS deals on London to Illinois flight tickets

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

See travel insights to Illinois from

How to get the cheapest flight ticket from London 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 to Illinois flight route?

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

Can stopping save me money on London to Illinois flights?

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

What airlines fly to Illinois?

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

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

Cheap London to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from London to Illinois

Best airlines flying from London to Illinois

Compare and see reviews for airlines that fly from London 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 flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

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