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

As of November 2025, there are 37 flights per day flying from Illinois to London. The most common time of day flights depart is 9:00PM, with 68% of flights taking off in the evening.

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 8h 43m and 10h 25m, respectively.

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

JetBlue, Scandinavian Airlines, and Lufthansa are the most popular carriers operating from Illinois to London

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

265 flights are operational weekly from Illinois to London as of November 2025. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.

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 50% of people opting to fly with this airline when traveling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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 November 2025, there are 17 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.

$234 Cheap Flights from Illinois to London in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Illinois to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:10 pm - 10:40 pmORD-LHR

21h 30m1 stop

7:55 pm - 2:45 pmLHR-ORD

24h 50m1 stop

$554TAP AIR PORTUGAL

Find Deal

Wed, Dec 3 - Sat, Dec 13

3:50 pm - 9:50 amORD-STN

12h 00m1 stop

12:00 pm - 5:55 pmSTN-ORD

11h 55m1 stop

$554Multiple Airlines

Find Deal

Sun, Dec 7 - Sat, Dec 13

7:10 pm - 4:25 pmORD-LHR

15h 15m2 stops

10:20 am - 4:45 pmLHR-ORD

12h 25m1 stop

$556Scandinavian Airlines

Find Deal

Sun, Jan 11 - Sat, Jan 17

7:20 pm - 4:25 pmORD-LHR

15h 05m2 stops

7:50 pm - 4:45 pmLHR-ORD

26h 55m2 stops

$557Scandinavian Airlines

Find Deal

Thu, Jan 22 - Tue, Feb 10

6:30 pm - 10:55 amORD-LGW

10h 25m1 stop

11:55 am - 5:20 pmLGW-ORD

11h 25m1 stop

$557Icelandair

Find Deal

Fri, Jan 9 - Mon, Jan 12

7:25 pm - 11:55 amORD-LHR

10h 30m1 stop

1:05 pm - 6:15 pmLHR-ORD

11h 10m1 stop

$558Icelandair

Find Deal

Wed, Apr 22 - Mon, Apr 27

1:47 pm - 7:05 amMDW-LHR

11h 18m1 stop

6:20 am - 6:00 pmLHR-MDW

17h 40m2 stops

$590Delta

Find Deal

Mon, Dec 1 - Tue, Dec 9

1:47 pm - 7:05 amMDW-LHR

11h 18m1 stop

11:05 am - 6:18 pmLHR-MDW

13h 13m1 stop

$597Delta

Find Deal

Mon, Dec 1 - Tue, Dec 9

6:50 pm - 12:55 pmORD-LCY

12h 05m1 stop

9:15 am - 4:20 pmLCY-ORD

13h 05m1 stop

$618SWISS

Find Deal

Mon, Dec 1 - Tue, Dec 16

6:50 pm - 12:55 pmORD-LCY

12h 05m1 stop

9:15 am - 4:20 pmLCY-ORD

13h 05m1 stop

$627SWISS

Find Deal

Mon, Dec 1 - Tue, Dec 9

Lufthansa flights from Illinois to London

Our best Lufthansa deals on Illinois to London flight tickets

Lufthansa

Dec 1

ORD9:50 pmChicago O'Hare Intl

15h 45m

1 stop

LHR7:35 pmLondon Heathrow

Dec 24

LHR11:10 amLondon Heathrow

13h 15m

1 stop

ORD6:25 pmChicago O'Hare Intl

$573

Find similar

Lufthansa

Nov 30

ORD10:35 pmChicago O'Hare Intl

11h 15m

1 stop

LHR3:50 pmLondon Heathrow

Dec 25

LHR11:10 amLondon Heathrow

13h 15m

1 stop

ORD6:25 pmChicago O'Hare Intl

$585

Find similar

Lufthansa

Nov 30

ORD9:05 pmChicago O'Hare Intl

8h 10m

LHR11:15 amLondon Heathrow

Dec 25

LHR8:45 amLondon Heathrow

15h 40m

1 stop

ORD6:25 pmChicago O'Hare Intl

$616

Find similar

Air Canada flights from Illinois to London

Our best Air Canada deals on Illinois to London flight tickets

Air Canada

Nov 26

ORD12:50 pmChicago O'Hare Intl

12h 20m

1 stop

LHR7:10 amLondon Heathrow

Dec 3

LHR6:50 amLondon Heathrow

17h 55m

2 stops

ORD6:45 pmChicago O'Hare Intl

$612

Find similar

Air Canada

Nov 26

ORD10:00 amChicago O'Hare Intl

15h 10m

2 stops

LHR7:10 amLondon Heathrow

Dec 3

LHR6:50 amLondon Heathrow

14h 05m

2 stops

ORD2:55 pmChicago O'Hare Intl

$619

Find similar

Air Canada

Nov 25

ORD12:50 pmChicago O'Hare Intl

12h 20m

1 stop

LHR7:10 amLondon Heathrow

Dec 2

LHR11:05 amLondon Heathrow

33h 50m

2 stops

ORD2:55 pmChicago O'Hare Intl

$626

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 12/3

7:10 pm-10:40 pm

1 stop21h 30m

London Heathrow

Sat 12/13

7:55 pm-2:45 pm

1 stop24h 50m

$554

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Sun 12/7

3:50 pm-9:50 am

1 stop12h 00m

London Stansted

Sat 12/13

12:00 pm-5:55 pm

1 stop11h 55m

$554

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 1/11

7:10 pm-4:25 pm

2 stops15h 15m

London Heathrow

Sat 1/17

10:20 am-4:45 pm

1 stop12h 25m

$556

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Thu 1/22

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Tue 2/10

7:50 pm-4:45 pm

2 stops26h 55m

$557

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 1/9

6:30 pm-10:55 am

1 stop10h 25m

London Gatwick

Mon 1/12

11:55 am-5:20 pm

1 stop11h 25m

$557

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/22

7:25 pm-11:55 am

1 stop10h 30m

London Heathrow

Mon 4/27

1:05 pm-6:15 pm

1 stop11h 10m

$558

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 12/1

1:47 pm-7:05 am

1 stop11h 18m

London Heathrow

Tue 12/9

6:20 am-6:00 pm

2 stops17h 40m

$590

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Mon 12/1

1:47 pm-7:05 am

1 stop11h 18m

London Heathrow

Tue 12/9

11:05 am-6:18 pm

1 stop13h 13m

$597

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 12/1

6:50 pm-12:55 pm

1 stop12h 05m

London City

Tue 12/16

9:15 am-4:20 pm

1 stop13h 05m

$618

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Mon 12/1

6:50 pm-12:55 pm

1 stop12h 05m

London City

Tue 12/9

9:15 am-4:20 pm

1 stop13h 05m

$627

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 February. Flight prices, which tend to average around $652, 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 $656.

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 $772. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $922. 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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $760 when looking at flights departing at noon. Flights to London are more costly in the afternoon, with an average ticket price of $836. 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 $794 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 $701 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 10% 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	$439
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	1 airport

The best one-way flight to London from Illinois in the past 72 hours is $439. The best round-trip flight deal from Illinois to London found on momondo in the last 72 hours is $713.

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

Direct flights go from Illinois to London every day.

There is 1 airport near London: 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 November 2025, there are 17 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 38.70% of the total bookings. Other popular models include Boeing 787-10 Dreamliner with 18.69%, Boeing 767-300 with 16.41%, and Boeing 777 with 15.64%.

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 2,902 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,788 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $338	Free Cancellation	Rating 7.4 1,584 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $345	Free Cancellation	Rating 7.9 8,002 reviews	Search Delta flights
TAP AIR PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.1 2,070 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $460	Free Cancellation	Rating 6.8 7,579 reviews	Search Lufthansa flights
Icelandair	PriceFrom $481	Free Cancellation	Rating 7.0 581 reviews	Search Icelandair flights
Alaska Airlines	PriceFrom $487	Free Cancellation	Rating 8.0 11,326 reviews	Search Alaska Airlines flights
British Airways	PriceFrom $502	Free Cancellation	Rating 6.7 7,533 reviews	Search British Airways flights
Aer Lingus	PriceFrom $515	Free Cancellation	Rating 7.2 1,377 reviews	Search Aer Lingus flights

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Chelmsford

Wembley

Folkestone

Romford

Ilford

Cobham

Stansted

Harrow

Watford

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.

An easier way to manage your London 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.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 12/20

Sat 12/27

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Cheap flights from Illinois to London from $234

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to London departing on 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Illinois to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Lufthansa flights from Illinois to London

Our best Lufthansa deals on Illinois to London flight tickets

Air Canada flights from Illinois to London

Our best Air Canada deals on Illinois to London flight tickets

momondo Fare Finder

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

See travel insights to London from

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

What is the cheapest month to fly to London?

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

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

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?

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 10% on your flight if you consider stops on a Illinois to London flight.

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

JetBlue, Scandinavian Airlines, and Lufthansa are the most popular carriers operating from Illinois to London

What airlines fly to London?

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

As of November 2025, there are 37 flights per day flying from Illinois to London. The most common time of day flights depart is 9:00PM, with 68% of flights taking off in the evening.

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

265 flights are operational weekly from Illinois to London as of November 2025. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.

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 8h 43m and 10h 25m, respectively.

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

Fastest flight time

Direct flights

Airports in London

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

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

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

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

What is the most popular plane model from Illinois to London?

Best airlines flying from Illinois to London

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

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London 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 the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London