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

As of January 2026, 42 flights take off from Illinois and land in London each day. The most common flight departure time for this route is 17:00, with 60% of daily flights taking off in the evening.

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

As of January 2026, 299 flights take off from Illinois and land in London each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.

How long does it take to fly to London?

Flight times from Illinois to London vary, but if you’re flying out of Chicago and flying into London Heathrow Airport (one of the most popular routes), then the duration is 9h 28m on average. Another popular route from Illinois to London is flying from Peoria to London Heathrow Airport, which will take roughly 9h 41m. Keep in mind that layovers or delays could extend your travel time.

Which airlines fly to London?

British Airways, Iberia and Aer Lingus 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 travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

TAP AIR PORTUGAL, Scandinavian Airlines, and Icelandair are the most popular carriers operating from Illinois to London

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

Prices for flights from Illinois to London refresh daily.

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

As of January 2026, there are 9 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 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 Illinois to London.

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

The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£206 Cheap Flights from Illinois to London in 2026

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Find the cheapest flights from Illinois to London

Round-trip

One-way

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Cheap return flights

Enter your travel dates to find the best prices.

19:25 - 20:20

ORD

LHR

18h 55m

1 stop

13:05 - 18:15

LHR

ORD

11h 10m

1 stop

£386Icelandair

Tue, 21 Apr - Wed, 6 May

21:50 - 21:05

ORD

STN

17h 15m

2 stops

15:15 - 16:20

STN

ORD

31h 05m

2 stops

£386Multiple Airlines

Wed, 11 Feb - Mon, 16 Feb

19:20 - 16:25

ORD

LHR

15h 05m

2 stops

19:30 - 16:45

LHR

ORD

27h 15m

1 stop

£386Scandinavian Airlines

Sat, 28 Feb - Sun, 1 Mar

19:25 - 14:40

ORD

LGW

13h 15m

1 stop

15:40 - 21:25

LGW

ORD

11h 45m

1 stop

£386Icelandair

Mon, 20 Apr - Wed, 13 May

18:50 - 12:55

ORD

LCY

12h 05m

1 stop

09:20 - 16:20

LCY

ORD

13h 00m

1 stop

£437SWISS

Wed, 18 Feb - Wed, 25 Feb

18:50 - 12:55

ORD

LCY

12h 05m

1 stop

09:20 - 16:20

LCY

ORD

13h 00m

1 stop

£439SWISS

Wed, 18 Feb - Wed, 25 Feb

11:45 - 07:05

MDW

LHR

13h 20m

1 stop

08:40 - 18:40

LHR

MDW

16h 00m

2 stops

£474Delta

Sun, 8 Feb - Thu, 5 Mar

10:49 - 06:25

MDW

LHR

13h 36m

1 stop

06:30 - 17:45

LHR

MDW

17h 15m

2 stops

£475Virgin Atlantic

Wed, 18 Feb - Tue, 24 Feb

13:26 - 08:45

MDW

LHR

13h 19m

1 stop

06:30 - 17:29

LHR

MDW

16h 59m

2 stops

£476Virgin Atlantic

Sun, 1 Feb - Tue, 10 Feb

18:14 - 11:40

MDW

LHR

11h 26m

1 stop

08:40 - 18:36

LHR

MDW

15h 56m

2 stops

£476Delta

Sun, 1 Feb - Tue, 10 Feb

British Airways flights from Illinois to London

Our best British Airways deals on Illinois to London flight tickets

British Airways

17 Apr

ORD22:35Chicago O'Hare Intl

7h 40m

LHR12:15London Heathrow

19 Apr

LHR07:55London Heathrow

14h 05m

1 stop

ORD16:00Chicago O'Hare Intl

£405

British Airways

18 Feb

ORD17:10Chicago O'Hare Intl

7h 45m

LHR06:55London Heathrow

25 Feb

LHR12:50London Heathrow

12h 25m

1 stop

ORD19:15Chicago O'Hare Intl

£413

British Airways

28 Jan

ORD21:45Chicago O'Hare Intl

7h 50m

LHR11:35London Heathrow

3 Feb

LHR09:50London Heathrow

15h 25m

1 stop

ORD19:15Chicago O'Hare Intl

£418

SWISS flights from Illinois to London

Our best SWISS deals on Illinois to London flight tickets

SWISS

17 Feb

ORD18:50Chicago O'Hare Intl

12h 10m

1 stop

LHR13:00London Heathrow

24 Feb

LHR20:05London Heathrow

26h 15m

1 stop

ORD16:20Chicago O'Hare Intl

£407

SWISS

28 Jan

ORD18:50Chicago O'Hare Intl

12h 10m

1 stop

LHR13:00London Heathrow

2 Feb

LHR18:40London Heathrow

27h 40m

1 stop

ORD16:20Chicago O'Hare Intl

£415

SWISS

26 Jan

ORD18:50Chicago O'Hare Intl

17h 00m

1 stop

LGW17:50London Gatwick

2 Feb

LGW18:40London Gatwick

27h 40m

1 stop

ORD16:20Chicago O'Hare Intl

£425

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 21/4

19:25-20:20

1 stop18h 55m

London Heathrow

Wed 6/5

13:05-18:15

1 stop11h 10m

£386

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Wed 11/2

21:50-21:05

2 stops17h 15m

London Stansted

Mon 16/2

15:15-16:20

2 stops31h 05m

£386

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sat 28/2

19:20-16:25

2 stops15h 05m

London Heathrow

Sun 1/3

19:30-16:45

1 stop27h 15m

£386

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Mon 20/4

19:25-14:40

1 stop13h 15m

London Gatwick

Wed 13/5

15:40-21:25

1 stop11h 45m

£386

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 18/2

18:50-12:55

1 stop12h 05m

London City

Wed 25/2

09:20-16:20

1 stop13h 00m

£437

ChicagoLondon

ORD - LCY

ORDLCY

Chicago O'Hare Intl

Wed 18/2

18:50-12:55

1 stop12h 05m

London City

Wed 25/2

09:20-16:20

1 stop13h 00m

£439

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 8/2

11:45-07:05

1 stop13h 20m

London Heathrow

Thu 5/3

08:40-18:40

2 stops16h 00m

£474

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Wed 18/2

10:49-06:25

1 stop13h 36m

London Heathrow

Tue 24/2

06:30-17:45

2 stops17h 15m

£475

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 1/2

13:26-08:45

1 stop13h 19m

London Heathrow

Tue 10/2

06:30-17:29

2 stops16h 59m

£476

ChicagoLondon

MDW - LHR

MDWLHR

Chicago Midway

Sun 1/2

18:14-11:40

1 stop11h 26m

London Heathrow

Tue 10/2

08:40-18:36

2 stops15h 56m

£476

Flights are sorted by cheapest return 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 £486, 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 £486.

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

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £503. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to London for around £658.

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

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £564. Flights in the afternoon are often more expensive, with an average ticket price of £577.

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 £583 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Illinois for as low as £512 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 23% 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	£333
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 £333. The best return flight deal from Illinois to London found on momondo in the last 72 hours is £537.

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 refresh daily.
How many operators does momondo search for flights from Illinois to London?
As of January 2026, there are 9 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 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 Illinois to London.
What documentation or ID do you need to fly to London?
The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
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
Lufthansa	PriceFrom £358	Free Cancellation	Rating 6.8 7,738 reviews	Search Lufthansa flights
American Airlines	PriceFrom £385	Free Cancellation	Rating 7.2 11,174 reviews	Search American Airlines flights
Finnair	PriceFrom £414	Free Cancellation	Rating 7.6 1,353 reviews	Search Finnair flights
British Airways	PriceFrom £423	Free Cancellation	Rating 6.7 7,689 reviews	Search British Airways flights
Aer Lingus	PriceFrom £449	Free Cancellation	Rating 7.2 1,441 reviews	Search Aer Lingus flights
Iberia	PriceFrom £454	Free Cancellation	Rating 7.0 3,094 reviews	Search Iberia flights
United Airlines	PriceFrom £462	Free Cancellation	Rating 7.4 9,190 reviews	Search United Airlines flights

Eastbourne

Luton

Milton Keynes

Gatwick

Maidstone

Slough

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Chelmsford

Hayes

Dover

Bedford

Worthing

Ramsgate

Colchester

Folkestone

Winchester

Why use momondo?

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

It is quick and easy to find Illinois to London 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 London that suits you.

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

All flight searches from Illinois to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Illinois to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to London from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

We make it super easy to schedule, organise 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

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London Heathrow Airport

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London Stansted Airport

Popular Cities in the United Kingdom

Flights to Manchesterfrom £33

Flights to Birminghamfrom £34

Flights to Edinburghfrom £30

Flights to Belfastfrom £30

Flights to Glasgowfrom £31

Flights to Bristolfrom £31

Flights to Newcastle upon Tynefrom £31

Flights to Liverpoolfrom £31

Flights to Aberdeenfrom £38

Flights to Leedsfrom £37

Flights to Invernessfrom £36

Flights to Newquayfrom £31

Cheap flights from Illinois to London from £165

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 23/3. 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, great deals

Big names, great deals

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Find the cheapest flights from Illinois to London

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British Airways flights from Illinois to London

Our best British Airways deals on Illinois to London flight tickets

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Our best SWISS 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.

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How to get the cheapest flight ticket from Illinois to London

What is the cheapest month to fly to London?

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

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £503. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to London for around £658.

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

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £564. Flights in the afternoon are often more expensive, with an average ticket price of £577.

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 23% 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, Scandinavian Airlines, and Icelandair are the most popular carriers operating from Illinois to London

Which airlines fly to London?

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

As of January 2026, 42 flights take off from Illinois and land in London each day. The most common flight departure time for this route is 17:00, with 60% of daily flights taking off in the evening.

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

As of January 2026, 299 flights take off from Illinois and land in London each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.

How long does it take to fly to London?

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

Travelling 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, organise 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