How long is the flight from London to Illinois?

There are many flights that can get you from London to Illinois in 12h 15m. Fly via Scandinavian Airlines, TAP AIR PORTUGAL, or Virgin Atlantic to get the fastest option. Airlines will cover a distance of 3960 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to fly from London to Illinois one-way?

For one-way options, check prices for JetBlue. According to our data, you can fly for as low as £315. Users have also found prices from £320 and £327 on Aer Lingus and Austrian Airlines, respectively.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular routes from London to Illinois?

While some choose either London Gatwick - Chicago O'Hare Intl or London Stansted - Chicago O'Hare Intl, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Illinois.

What are the cheapest flights from London to Illinois?

Looking for the cheapest flight from London to Illinois? While on average our users pay £1,558, our data indicates the cheapest price to be £417. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £377.

What are the most reliable airlines from London to Illinois?

Before booking your flight to Illinois from London, check out the most reliable airlines to get you to your destination on time: Air Canada (88%), Austrian Airlines (88%), United Airlines( 88%).

What are the most popular airlines that fly from London to Illinois?

When booking a flight from London to Illinois, you may want to consider flying on British Airways, Icelandair or Lufthansa as they are the most popular for this route.

Can I find deals for flights from London to Illinois that include hotel bookings?

Yes. In addition to deals on London to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to Illinois?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Illinois.

Can I find deals for business class flights from London to Illinois?

Yes. Cheapflights offers flight deals from London to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£358+ Cheap Flights from London to Illinois

Cheap flight deals from London to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from London to Illinois
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Fri 25/1212:15 -

1 stop11h 05m

Sat 16/119:25 -

1 stop9h 25m

Deal found 29/9£533

Thu 15/1009:25 -

1 stop15h 50m

Mon 19/1021:00 -

1 stop12h 45m

Deal found 29/9£533

Thu 15/1013:10 -

1 stop12h 05m

Mon 19/1015:45 -

1 stop11h 25m

Deal found 29/9£534

Sun 15/1121:05 -

2 stops25h 40m

Sun 29/1119:10 -

1 stop17h 20m

Deal found 30/9£534

Thu 3/1221:30 -

1 stop23h 25m

Mon 7/1217:40 -

1 stop21h 10m

Deal found 29/9£534

Tue 17/1120:35 -

2 stops29h 20m

Sun 22/1121:55 -

1 stop16h 15m

Deal found 30/9£534

Thu 10/1208:50 -

2 stops14h 30m

Mon 14/1218:30 -

3 stops32h 30m

Deal found 30/9£535

Fri 11/1207:05 -

2 stops15h 40m

Sat 9/119:10 -

2 stops15h 15m

Deal found 29/9£535

Fri 9/1006:20 -

1 stop18h 55m

Mon 12/1015:45 -

1 stop15h 00m

Deal found 29/9£535

Wed 14/1017:15 -

2 stops28h 55m

Mon 19/1019:15 -

2 stops19h 20m

Deal found 30/9£535

Thu 29/1011:55 -

1 stop11h 25m

Thu 5/1118:30 -

1 stop10h 25m

Deal found 1/10£535

Mon 23/1107:05 -

2 stops15h 40m

Mon 7/1219:10 -

1 stop20h 30m

Deal found 3/10£535

Best flights from London to Illinois
Discover carefully curated flight deals from London to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Wed 28/1006:40 -

1 stop16h 05m

Mon 9/1119:10 -

2 stops20h 25m

Deal found 1/10£547

Thu 5/1106:15 -

1 stop13h 55m

Mon 9/1115:55 -

1 stop12h 50m

Deal found 3/10£557

Thu 21/116:00 -

1 stop29h 30m

Fri 29/120:10 -

1 stop13h 35m

Deal found 3/10£597

Sat 31/1010:00 -

1 stop12h 15m

Sat 14/1114:44 -

2 stops19h 01m

Deal found 29/9£598

Tue 20/1011:05 -

Nonstop9h 05m

Wed 2/1215:45 -

Nonstop8h 10m

Deal found 29/9£628

Mon 16/1106:30 -

2 stops16h 35m

Mon 21/1207:05 -

1 stop20h 50m

Deal found 3/10£655

Wed 2/1215:40 -

Nonstop9h 05m

Tue 22/1216:34 -

1 stop13h 26m

Deal found 3/10£665

Tue 20/1013:30 -

1 stop12h 25m

Fri 4/1221:50 -

Nonstop8h 10m

Deal found 3/10£677

Thu 29/1011:55 -

1 stop11h 25m

Sat 7/1113:00 -

2 stops15h 55m

Deal found 1/10£710

Mon 2/1110:55 -

1 stop38h 25m

Mon 16/1120:15 -

1 stop31h 40m

Deal found 2/10£716

Wed 13/118:40 -

1 stop24h 00m

Sun 24/118:30 -

2 stops17h 20m

Deal found 2/10£732

Sat 21/1108:40 -

1 stop11h 45m

Thu 3/1216:25 -

1 stop10h 25m

Deal found 3/10£781

Wed 23/1206:50 -

1 stop13h 20m

Mon 4/121:00 -

1 stop15h 35m

Deal found 2/10£842

Wed 25/1110:20 -

1 stop12h 25m

Tue 1/1219:10 -

2 stops20h 25m

Deal found 30/9£549

Tue 24/1107:15 -

1 stop12h 55m

Mon 30/1120:05 -

1 stop12h 00m

Deal found 4/10£559

Thu 19/1119:50 -

2 stops26h 55m

Mon 23/1119:10 -

1 stop14h 50m

Deal found 30/9£552

Mon 16/1106:10 -

1 stop14h 00m

Mon 23/1115:55 -

1 stop12h 50m

Deal found 2/10£562

Wed 25/1106:20 -

2 stops17h 44m

Tue 1/1210:24 -

2 stops14h 26m

Deal found 30/9£641

Mon 2/1106:30 -

2 stops17h 30m

Mon 16/1117:13 -

1 stop12h 27m

Deal found 4/10£657

Wed 21/1021:15 -

2 stops21h 25m

Fri 4/1220:10 -

1 stop13h 35m

Deal found 29/9£666

Wed 28/1011:10 -

1 stop13h 15m

Mon 9/1115:45 -

Nonstop8h 10m

Deal found 2/10£670

Wed 28/1006:40 -

1 stop16h 05m

Sat 7/1119:10 -

2 stops20h 10m

Deal found 1/10£566

Thu 3/1208:20 -

2 stops15h 00m

Tue 8/1218:30 -

2 stops13h 20m

Deal found 29/9£578

Thu 12/1110:55 -

1 stop37h 25m

Thu 26/1111:45 -

1 stop22h 35m

Deal found 2/10£718

Thu 5/1119:05 -

1 stop23h 35m

Wed 18/1121:35 -

2 stops14h 55m

Deal found 3/10£756

Thu 24/1216:00 -

1 stop29h 30m

Fri 1/120:10 -

2 stops30h 10m

Deal found 29/9£688

Sat 21/1111:20 -

1 stop12h 44m

Wed 2/1210:24 -

2 stops15h 21m

Deal found 3/10£699

Thu 8/1015:50 -

2 stops26h 45m

Wed 21/1014:20 -

2 stops19h 05m

Deal found 29/9£579

Sat 21/1108:55 -

1 stop13h 23m

Sat 28/1113:05 -

1 stop12h 45m

Deal found 1/10£711

Thu 19/1117:20 -

1 stop31h 00m

Mon 23/1120:15 -

1 stop31h 40m

Deal found 30/9£720

Find flight deals from London to Illinois

Round-trip from	£533
One-way from	£358
Popular in	August
Cheapest in	February
Average price	£628
Good round-trip deal	£580 or less
Good one-way deal	£570 or less

Icelandair
25/12-16/1
2 total stops
20h 30m total
London to Illinois

Search Deals

28/10-31/12
2 total stops
27h 30m total
London to Illinois

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£64 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a round-trip flight from London (LON) to Illinois.

Search Deals

Price to beat on a one-way flight from London (LON) to Illinois.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Mon 21/12

10:55-17:20

3 stops36h 25m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£359

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 21/12

16:00-17:20

2 stops31h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£362

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Fri 30/10

12:35-08:46

1 stop25h 11m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£370

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Sun 15/11

08:15-18:20

3 stops40h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£371

LondonChicago

STN London Stansted - MDW Chicago Midway

STNMDW

London Stansted

Fri 13/11

06:00-17:47

3 stops41h 47m

Chicago Midway

Wed 31/12

00:00-07:00

Nonstop0h 00m

£374

LondonChicago

STN London Stansted - ORD Chicago O'Hare Intl

STNORD

London Stansted

Wed 14/10

07:45-12:40

2 stops34h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£377

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Sun 15/11

12:35-08:46

1 stop26h 11m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£378

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 14/12

06:10-14:10

1 stop14h 00m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£378

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 14/10

15:35-12:40

3 stops27h 05m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£382

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Sun 6/12

20:05-16:15

1 stop26h 10m

Chicago O'Hare Intl

Wed 31/12

00:00-07:00

Nonstop0h 00m

£393

Flights are sorted by cheapest return flights first.

Deals found on 3/10

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from London to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from London with our price prediction graph.

STN-ORD

LGW-ORD

LHR-ORD

LTN-ORD

LCY-ORD

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Illinois

LON-USIL

STN-ORD

LGW-ORD

LHR-ORD

LTN-ORD

What is the cheapest month to book a flight from London to Illinois?

Currently, February is the cheapest month in which you can book a flight from London to Illinois (average of £495). Flying from London to Illinois in August is currently the most expensive (average of £805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to IL?

When flying from London to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Illinois

The most flights from LON to USIL are scheduled on a Friday (50 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from London to Illinois?

Airfare is below average for this route at the moment.

London to Illinois flights typically cost between £561 and £735 in December.
The cheapest return price found within the last 5 days was £533 on Icelandair (25 Dec–16 Jan).

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

The best time to book flights from London to Illinois is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown with United Airlines,Aer Lingus, andIcelandair from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

United Airlines

7.4

Good

10,282 reviews

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Aer Lingus

7.3

Good

1,811 reviews

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Icelandair

6.9

Okay

758 reviews

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Lufthansa

6.8

Okay

8,256 reviews

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

British Airways

6.7

Okay

8,244 reviews

United Airlines

7.4

Good

10,282 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Related info for your journey

How long is the flight from London to Illinois?
There are many flights that can get you from London to Illinois in 12h 15m. Fly via Scandinavian Airlines, TAP AIR PORTUGAL, or Virgin Atlantic to get the fastest option. Airlines will cover a distance of 3960 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from London to Illinois one-way?
For one-way options, check prices for JetBlue. According to our data, you can fly for as low as £315. Users have also found prices from £320 and £327 on Aer Lingus and Austrian Airlines, respectively.
What are the most popular routes from London to Illinois?
While some choose either London Gatwick - Chicago O'Hare Intl or London Stansted - Chicago O'Hare Intl, London Heathrow - Chicago O'Hare Intl is the most popular route from London to Illinois.
What are the most reliable airlines from London to Illinois?
Before booking your flight to Illinois from London, check out the most reliable airlines to get you to your destination on time: Air Canada (88%), Austrian Airlines (88%), United Airlines( 88%).
What are the cheapest flights from London to Illinois?
Looking for the cheapest flight from London to Illinois? While on average our users pay £1,558, our data indicates the cheapest price to be £417. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £377.
Can I find deals for flights from London to Illinois that include hotel bookings?
Yes. In addition to deals on London to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Illinois.
Can I find deals for business class flights from London to Illinois?
Yes. Cheapflights offers flight deals from London to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Illinois?
Currently, February is the cheapest month in which you can book a flight from London to Illinois (average of £495). Flying from London to Illinois in August is currently the most expensive (average of £805). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for London to Illinois

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Top 10 airlines flying from London to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£214	Average£660	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£360	Average£518	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£392	Average£554	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£393	Average£594	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£411	Average£798	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
British Airways	Cheapest£427	Average£699	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£434	Average£732	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£439	Average£786	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
JetBlue	Cheapest£449	Average£692	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Austrian Airlines	Cheapest£454	Average£694	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to Illinois?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from London today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from London to Illinois?

Cheapflights simply makes it quick and affordable to book flights from London to Illinois by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to Illinois with no change fees?

Certainly. Search results for flights to Illinois from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from London today and book when prices fit your budget.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London to Illinois from £358

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Illinois

Cheapest flights from London to IllinoisExplore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Best flights from London to IllinoisDiscover carefully curated flight deals from London to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Discover carefully curated flight deals from London to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Direct flights from London to IllinoisExplore direct flight options from London to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 October 2026.

Explore direct flight options from London to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 October 2026.

Last-minute flights from London to IllinoisDiscover last-minute flight deals from London to Illinois. Data last updated 4 October 2026 and is based on user searches.

Discover last-minute flight deals from London to Illinois. Data last updated 4 October 2026 and is based on user searches.

One-way flights from London to IllinoisSearch for one-way flight options from London to Illinois. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.

Search for one-way flight options from London to Illinois. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.

Find flight deals from London to Illinois

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

Best time to book a flight from London to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from London with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London to Illinois?

What is the cheapest time of day to fly from LON to IL?

Find hourly flight availability from London to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 October 2026.

When flying from London to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to Illinois

Explore weekly flight availability from London to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 October 2026.

The most flights from LON to USIL are scheduled on a Friday (50 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from London to Illinois?

Airfare is below average for this route at the moment.

London to Illinois flights typically cost between £561 and £735 in December.The cheapest return price found within the last 5 days was £533 on Icelandair (25 Dec–16 Jan).

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

The best time to book flights from London to Illinois is 79 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown with United Airlines,Aer Lingus, andIcelandair from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from London to Illinois?

What are the cheapest airlines to fly from London to Illinois one-way?

What are the most popular routes from London to Illinois?

What are the most reliable airlines from London to Illinois?

What are the cheapest flights from London to Illinois?

Can I find deals for flights from London to Illinois that include hotel bookings?

How can I find direct flights from London to Illinois?

Can I find deals for business class flights from London to Illinois?

What is the cheapest month to book a flight from London to Illinois?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from London to Illinois by cabin class

Find flights from London to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

London and Illinois flights

Browse other London and Illinois flight options. Last updated on 4 October 2026.

Popular flight searches

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London to Illinois flights

Consider these flights travelling from London to Illinois.

Top 10 airlines flying from London to Illinois

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Cheapest flights from London to Illinois
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 October 2026.

Best flights from London to Illinois
Discover carefully curated flight deals from London to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 October 2026.

Direct flights from London to Illinois
Explore direct flight options from London to Illinois based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 October 2026.

Last-minute flights from London to Illinois
Discover last-minute flight deals from London to Illinois. Data last updated 4 October 2026 and is based on user searches.

One-way flights from London to Illinois
Search for one-way flight options from London to Illinois. Find affordable one-way fares based on user searches. Data last updated 4 October 2026.

London to Illinois flights typically cost between £561 and £735 in December.
The cheapest return price found within the last 5 days was £533 on Icelandair (25 Dec–16 Jan).