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

TAP AIR PORTUGAL and WestJet are the most popular carriers operating from Illinois to London

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 22m and 10h 25m, respectively.

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 47% 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.

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

As of August 2025, there are 50 flights per day flying from Illinois to London. The most common time of day flights depart is 9:00PM, with 65% of flights taking off in the evening.

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

356 flights are operational weekly from Illinois to London as of August 2025. The most popular departure day for this route is Mon, with 16% 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 August 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.

$188 Cheap Flights from Illinois to London in 2025

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Find the cheapest flights from Illinois to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:20 pm - 4:25 pmORD-LHR

15h 05m2 stops

6:40 am - 4:45 pmLHR-ORD

16h 05m2 stops

$422Scandinavian Airlines

Find Deal

Sat, Nov 8 - Mon, Nov 10

7:20 pm - 9:40 pmORD-LHR

20h 20m1 stop

6:40 am - 4:45 pmLHR-ORD

16h 05m2 stops

$425Scandinavian Airlines

Find Deal

Sat, Nov 8 - Mon, Nov 10

7:15 am - 2:10 pmORD-STN

24h 55m3 stops

5:55 am - 7:30 pmSTN-ORD

19h 35m2 stops

$461

Find Deal

Wed, Nov 12 - Wed, Nov 19

10:40 am - 6:30 amORD-LHR

13h 50m1 stop

6:00 am - 3:55 pmLHR-ORD

15h 55m1 stop

$477

Find Deal

Tue, Aug 26 - Tue, Sep 2

10:15 pm - 2:40 pmORD-LGW

10h 25m1 stop

3:40 pm - 6:15 pmLGW-ORD

32h 35m1 stop

$482Icelandair

Find Deal

Wed, Oct 8 - Mon, Oct 20

4:55 pm - 6:50 amORD-LHR

7h 55mnonstop

8:20 am - 3:45 pmLHR-ORD

13h 25m1 stop

$485British Airways

Find Deal

Wed, Sep 3 - Thu, Sep 18

3:45 pm - 8:00 amORD-LHR

10h 15m1 stop

8:50 am - 2:00 pmLHR-ORD

11h 10m1 stop

$486Aer Lingus

Find Deal

Tue, Aug 12 - Tue, Aug 19

3:45 pm - 8:00 amORD-LHR

10h 15m1 stop

8:50 am - 2:00 pmLHR-ORD

11h 10m1 stop

$487Aer Lingus

Find Deal

Tue, Aug 12 - Tue, Aug 19

10:15 pm - 2:40 pmORD-LGW

10h 25m1 stop

3:40 pm - 9:15 pmLGW-ORD

11h 35m1 stop

$488Icelandair

Find Deal

Wed, Oct 1 - Sun, Oct 12

1:54 pm - 10:05 amORD-LHR

14h 11m1 stop

6:20 am - 3:45 pmLHR-ORD

15h 25m1 stop

$489British Airways

Find Deal

Wed, Aug 27 - Thu, Sep 4

United Airlines flights from Illinois to London

Our best United Airlines deals on Illinois to London flight tickets

United Airlines

Aug 10

ORD10:40 amChicago O'Hare Intl

13h 50m

1 stop

LHR6:30 amLondon Heathrow

Aug 19

LHR8:30 amLondon Heathrow

8h 55m

ORD11:25 amChicago O'Hare Intl

$488

Find similar

United Airlines

Aug 10

ORD2:07 pmChicago O'Hare Intl

13h 53m

1 stop

LHR10:00 amLondon Heathrow

Aug 19

LHR8:00 amLondon Heathrow

12h 55m

1 stop

ORD2:55 pmChicago O'Hare Intl

$490

Find similar

United Airlines

Aug 10

ORD4:05 pmChicago O'Hare Intl

8h 15m

LHR6:20 amLondon Heathrow

Aug 19

LHR11:05 amLondon Heathrow

9h 05m

ORD2:10 pmChicago O'Hare Intl

$491

Find similar

British Airways flights from Illinois to London

Our best British Airways deals on Illinois to London flight tickets

British Airways

Aug 11

ORD5:40 pmChicago O'Hare Intl

7h 40m

LHR7:20 amLondon Heathrow

Aug 29

LHR6:20 amLondon Heathrow

15h 25m

1 stop

ORD3:45 pmChicago O'Hare Intl

$484

Find similar

British Airways

Aug 11

ORD10:35 pmChicago O'Hare Intl

7h 40m

LHR12:15 pmLondon Heathrow

Aug 22

LHR6:20 amLondon Heathrow

15h 25m

1 stop

ORD3:45 pmChicago O'Hare Intl

$485

Find similar

British Airways

Aug 27

ORD1:54 pmChicago O'Hare Intl

14h 11m

1 stop

LHR10:05 amLondon Heathrow

Sep 4

LHR6:20 amLondon Heathrow

15h 25m

1 stop

ORD3:45 pmChicago O'Hare Intl

$489

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/8

7:20 pm-4:25 pm

2 stops15h 05m

London Heathrow

Mon 11/10

6:40 am-4:45 pm

2 stops16h 05m

$422

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 11/8

7:20 pm-9:40 pm

1 stop20h 20m

London Heathrow

Mon 11/10

6:40 am-4:45 pm

2 stops16h 05m

$425

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 11/12

7:15 am-2:10 pm

3 stops24h 55m

London Stansted

Wed 11/19

5:55 am-7:30 pm

2 stops19h 35m

$461

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/26

10:40 am-6:30 am

1 stop13h 50m

London Heathrow

Tue 9/2

6:00 am-3:55 pm

1 stop15h 55m

$477

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 10/8

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Mon 10/20

3:40 pm-6:15 pm

1 stop32h 35m

$482

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 9/3

4:55 pm-6:50 am

Nonstop7h 55m

London Heathrow

Thu 9/18

8:20 am-3:45 pm

1 stop13h 25m

$485

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/12

3:45 pm-8:00 am

1 stop10h 15m

London Heathrow

Tue 8/19

8:50 am-2:00 pm

1 stop11h 10m

$486

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/12

3:45 pm-8:00 am

1 stop10h 15m

London Heathrow

Tue 8/19

8:50 am-2:00 pm

1 stop11h 10m

$487

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Wed 10/1

10:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Sun 10/12

3:40 pm-9:15 pm

1 stop11h 35m

$488

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 8/27

1:54 pm-10:05 am

1 stop14h 11m

London Heathrow

Thu 9/4

6:20 am-3:45 pm

1 stop15h 25m

$489

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 $648, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Illinois averaging around $666.

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

The cheapest day to depart from Illinois to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $764. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $893. 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 morning is the least expensive time of day to depart. momondo users have found prices as low as $685 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $824. 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 $795 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 $707 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 46% 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	$188
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	4 airports

The best one-way flight to London from Illinois in the past 72 hours is $188. The best round-trip flight deal from Illinois to London found on momondo in the last 72 hours is $422.

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

Direct flights go from Illinois to London every day.

There are 4 airports near London: London City (LCY), London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)

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 August 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 41.48% of the total bookings. Other popular models include Boeing 777 with 18.97%, Boeing 787-10 Dreamliner with 17.28%, and Boeing 767-300 with 15.74%.

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 2,915 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,686 reviews	Search SWISS flights
Delta	PriceFrom $345	Free Cancellation	Rating 8.0 7,983 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $358	Free Cancellation	Rating 7.3 1,457 reviews	Search Scandinavian Airlines flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 7,276 reviews	Search Lufthansa flights
Icelandair	PriceFrom $470	Free Cancellation	Rating 7.0 520 reviews	Search Icelandair flights
TAP AIR PORTUGAL	PriceFrom $508	Free Cancellation	Rating 7.1 1,936 reviews	Search TAP AIR PORTUGAL flights
Aer Lingus	PriceFrom $552	Free Cancellation	Rating 7.1 1,193 reviews	Search Aer Lingus flights
Finnair	PriceFrom $568	Free Cancellation	Rating 7.6 1,317 reviews	Search Finnair flights
Iberia	PriceFrom $580	Free Cancellation	Rating 7.0 2,862 reviews	Search Iberia flights

Gatwick

Hounslow

Dover

Slough

Luton

Dartford

Guildford

Milton Keynes

Stansted

Hayes

Crawley

Croydon

Chelmsford

Ilford

Brentwood

Colchester

Folkestone

Watford

Canterbury

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.

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.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Popular cities in the United Kingdom

Flights to Manchesterfrom $372

Flights to Edinburghfrom $405

Flights to Glasgowfrom $417

Flights to Birminghamfrom $384

Flights to Belfastfrom $442

Flights to Newcastle upon Tynefrom $462

Flights to Bristolfrom $465

Flights to Invernessfrom $402

Flights to Liverpoolfrom $475

Flights to Aberdeenfrom $506

Flights to Leedsfrom $473

Flights to Cardifffrom $438

Cheap flights from Illinois to London from $188

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 10/19. 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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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Illinois to London

Cheap round-trip flights

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Cheap last minute flights

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United Airlines flights from Illinois to London

Our best United Airlines deals on Illinois to London flight tickets

British Airways flights from Illinois to London

Our best British Airways deals on Illinois to London flight tickets

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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 46% on your flight if you consider stops on a Illinois to London flight.

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

TAP AIR PORTUGAL and WestJet 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 August 2025, there are 50 flights per day flying from Illinois to London. The most common time of day flights depart is 9:00PM, with 65% of flights taking off in the evening.

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

356 flights are operational weekly from Illinois to London as of August 2025. The most popular departure day for this route is Mon, with 16% 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 9h 22m 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