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

Icelandair, Scandinavian Airlines, and British Airways are the most popular carriers operating from Illinois to London

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

As of January 2026, there are 42 flights per day flying from Illinois to London. The most common time of day flights depart is 5:00PM, with 60% of flights taking off in the evening.

What airlines fly to London?

British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London from Illinois 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 London. Keep in mind that there are 18 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to London?

If you’re flying from a popular airport in Illinois, such as Chicago or Peoria, and flying into London, then you can expect flight times to average 9h 28m and 9h 41m, respectively.

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

299 flights are operational weekly from Illinois to London as of January 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?

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

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

As of January 2026, there are 18 operators available to choose from for flights from Illinois to London.

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

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.

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

The travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$284 Cheap Flights from Illinois to London in 2026

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Find the cheapest flights from Illinois to London

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 pm - 10:55 am

ORD

LGW

10h 25m

1 stop

11:55 am - 5:20 pm

LGW

ORD

11h 25m

1 stop

$517Icelandair

Mon, Feb 23 - Wed, Mar 4

7:25 pm - 8:20 pm

ORD

LHR

18h 55m

1 stop

1:05 pm - 6:15 pm

LHR

ORD

11h 10m

1 stop

$518Icelandair

Wed, Apr 22 - Fri, May 1

9:50 pm - 9:05 pm

ORD

STN

17h 15m

2 stops

3:15 pm - 4:20 pm

STN

ORD

31h 05m

2 stops

$518Multiple Airlines

Wed, Feb 11 - Mon, Feb 16

10:00 am - 12:45 pm

ORD

LGW

20h 45m

2 stops

8:35 pm - 2:10 pm

LGW

ORD

22h 35m

2 stops

$520Multiple Airlines

Sun, Mar 1 - Mon, Mar 9

6:50 pm - 12:55 pm

ORD

LCY

12h 05m

1 stop

9:20 am - 4:20 pm

LCY

ORD

13h 00m

1 stop

$587SWISS

Wed, Feb 18 - Wed, Feb 25

6:50 pm - 12:55 pm

ORD

LCY

12h 05m

1 stop

9:20 am - 4:20 pm

LCY

ORD

13h 00m

1 stop

$589SWISS

Wed, Feb 18 - Wed, Feb 25

4:05 pm - 6:35 am

STL

LHR

32h 30m

1 stop

2:10 pm - 8:04 pm

LHR

STL

11h 54m

1 stop

$627Air Canada

Sat, Apr 25 - Thu, May 7

4:05 pm - 9:35 am

STL

LHR

11h 30m

1 stop

2:05 pm - 3:24 pm

LHR

STL

31h 19m

2 stops

$630Air Canada

Mon, Mar 30 - Wed, Apr 8

11:45 am - 7:05 am

MDW

LHR

13h 20m

1 stop

8:40 am - 6:40 pm

LHR

MDW

16h 00m

2 stops

$637Delta

Sun, Feb 8 - Thu, Mar 5

1:28 pm - 8:05 am

MDW

LHR

12h 37m

2 stops

8:40 am - 6:40 pm

LHR

MDW

16h 00m

2 stops

$642Delta

Tue, Feb 17 - Tue, Feb 24

British Airways flights from Illinois to London

Our best British Airways deals on Illinois to London flight tickets

British Airways

Apr 17

ORD10:35 pmChicago O'Hare Intl

7h 40m

LHR12:15 pmLondon Heathrow

Apr 19

LHR7:55 amLondon Heathrow

14h 05m

1 stop

ORD4:00 pmChicago O'Hare Intl

$544

British Airways

Feb 2

ORD5:10 pmChicago O'Hare Intl

7h 45m

LHR6:55 amLondon Heathrow

Feb 25

LHR12:50 pmLondon Heathrow

12h 25m

1 stop

ORD7:15 pmChicago O'Hare Intl

$555

British Airways

Feb 18

ORD5:10 pmChicago O'Hare Intl

7h 45m

LHR6:55 amLondon Heathrow

Feb 25

LHR12:10 pmLondon Heathrow

13h 05m

1 stop

ORD7:15 pmChicago O'Hare Intl

$556

Virgin Atlantic flights from Illinois to London

Our best Virgin Atlantic deals on Illinois to London flight tickets

Virgin Atlantic

Feb 18

MDW10:49 amChicago Midway

13h 36m

1 stop

LHR6:25 amLondon Heathrow

Feb 24

LHR6:30 amLondon Heathrow

17h 15m

2 stops

MDW5:45 pmChicago Midway

$638

Virgin Atlantic

Feb 1

MDW12:46 pmChicago Midway

14h 14m

1 stop

LHR9:00 amLondon Heathrow

Feb 10

LHR6:30 amLondon Heathrow

16h 59m

2 stops

MDW5:29 pmChicago Midway

$639

Virgin Atlantic

Feb 1

MDW9:33 amChicago Midway

17h 12m

1 stop

LHR8:45 amLondon Heathrow

Feb 10

LHR6:30 amLondon Heathrow

16h 59m

2 stops

MDW5:29 pmChicago Midway

$640

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 2/23

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Wed 3/4

11:55 am-5:20 pm

1 stop11h 25m

$517

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/22

7:25 pm-8:20 pm

1 stop18h 55m

London Heathrow

Fri 5/1

1:05 pm-6:15 pm

1 stop11h 10m

$518

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 2/11

9:50 pm-9:05 pm

2 stops17h 15m

London Stansted

Mon 2/16

3:15 pm-4:20 pm

2 stops31h 05m

$518

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 3/1

10:00 am-12:45 pm

2 stops20h 45m

London Gatwick

Mon 3/9

8:35 pm-2:10 pm

2 stops22h 35m

$520

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 2/18

6:50 pm-12:55 pm

1 stop12h 05m

London City

Wed 2/25

9:20 am-4:20 pm

1 stop13h 00m

$587

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 2/18

6:50 pm-12:55 pm

1 stop12h 05m

London City

Wed 2/25

9:20 am-4:20 pm

1 stop13h 00m

$589

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 4/25

4:05 pm-6:35 am

1 stop32h 30m

London Heathrow

Thu 5/7

2:10 pm-8:04 pm

1 stop11h 54m

$627

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 3/30

4:05 pm-9:35 am

1 stop11h 30m

London Heathrow

Wed 4/8

2:05 pm-3:24 pm

2 stops31h 19m

$630

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 2/8

11:45 am-7:05 am

1 stop13h 20m

London Heathrow

Thu 3/5

8:40 am-6:40 pm

2 stops16h 00m

$637

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Tue 2/17

1:28 pm-8:05 am

2 stops12h 37m

London Heathrow

Tue 2/24

8:40 am-6:40 pm

2 stops16h 00m

$642

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

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?

The cheapest month to fly to London from Illinois is in April. Flight prices, which tend to average around $653, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Illinois averaging around $653.

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

The cheapest day to depart from Illinois to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $765. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $923. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as $804 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $831. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Illinois to London flight route?

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

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

You are more likely to see cheaper flights to London from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Illinois for as low as $688 on momondo.

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

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

You could potentially save up to 8% on your flight if you consider stops on a Illinois to London flight.

Cheap Illinois to London flight deals and tips

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

Best Price Found	$407
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	6 airports

The best one-way flight to London from Illinois in the past 72 hours is $407. The best round-trip flight deal from Illinois to London found on momondo in the last 72 hours is $653.

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

Direct flights go from Illinois to London every day.

There are 6 airports in London. From Illinois there are direct flights to London Heathrow (LHR).

Search flight deals

When did momondo last update prices for flights from Illinois to London?
Prices for flights from Illinois to London were last updated today.
How many operators does momondo search for flights from Illinois to London?
As of January 2026, there are 18 operators available to choose from for flights from Illinois to London.
How old do you have to be to fly from Illinois to London?
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.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London 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. 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?
Based on momondo bookings for flights between Illinois and London, the leading plane model is Boeing 787-9 Dreamliner, making up 38.80% of the total bookings. Other popular models include Boeing 767-300 with 23.36%, Boeing 787-10 Dreamliner with 14.37%, and Boeing 777 with 11.26%.

Best airlines flying from Illinois to London

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

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $51	Free Cancellation	Rating 7.2 2,891 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,855 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $331	Free Cancellation	Rating 7.3 1,660 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $345	Free Cancellation	Rating 7.9 8,088 reviews	Search Delta flights
TAP AIR PORTUGAL	PriceFrom $427	Free Cancellation	Rating 7.1 2,126 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $469	Free Cancellation	Rating 7.1 602 reviews	Search Icelandair flights
Lufthansa	PriceFrom $480	Free Cancellation	Rating 6.8 7,743 reviews	Search Lufthansa flights
Aer Lingus	PriceFrom $499	Free Cancellation	Rating 7.2 1,442 reviews	Search Aer Lingus flights
Finnair	PriceFrom $516	Free Cancellation	Rating 7.6 1,353 reviews	Search Finnair flights
Alaska Airlines	PriceFrom $522	Free Cancellation	Rating 8.0 11,775 reviews	Search Alaska Airlines flights

Gatwick

Hounslow

Luton

Milton Keynes

Dover

Slough

Guildford

Wembley

Crawley

Dartford

Hayes

Brentwood

Watford

Cobham

Folkestone

Romford

Stansted

Harrow

Croydon

Richmond

Why use momondo?

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

Finding the right flight to London from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to London from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Illinois and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Illinois to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.