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Cheap flights from London to Illinois from £225

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated 9 January 2026.

Round-trip from

£399

One-way from

£225

Popular in

July

Cheapest in

February

Average price

£462

Good round-trip deal

£519 or less

Good one-way deal

£445 or less
British Airways
  • British Airways
  • 5/2-12/2
  • 2 total stops
  • 24h 30m total
  • London to Illinois
Search Deals
5/2
  • 5/2
  • 3 total stops
  • 50h 56m total
  • London to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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

Find flight deals from London to Illinois

Enter your travel dates to find the best prices.

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 9 January 2026.

Mon 12/120:35LHR - ORD
1 stop26h 45mIcelandair
Mon 19/118:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 7/1£399
Sat 17/106:00LHR - ORD
1 stop12h 45mMultiple Airlines
Sat 24/121:05ORD - LHR
Nonstop8h 10mMultiple Airlines
Deal found 7/1£400
Fri 16/106:00LHR - ORD
1 stop12h 45mMultiple Airlines
Thu 29/115:45ORD - LHR
Nonstop8h 10mMultiple Airlines
Deal found 8/1£401
Sat 7/207:40LHR - ORD
1 stop12h 30mMultiple Airlines
Sun 22/221:15ORD - LHR
Nonstop8h 00mMultiple Airlines
Deal found 7/1£402
Sat 7/212:10LHR - ORD
1 stop13h 05mBritish Airways
Sat 28/217:10ORD - LHR
Nonstop7h 45mBritish Airways
Deal found 8/1£402
Sat 14/207:50LHR - ORD
1 stop17h 25mBritish Airways
Sun 22/221:00ORD - LHR
1 stop12h 35mBritish Airways
Deal found 8/1£403
Fri 6/209:00LHR - ORD
1 stop13h 20mUnited Airlines
Sat 14/221:15ORD - LHR
Nonstop8h 00mUnited Airlines
Deal found 7/1£404
Wed 11/211:55LGW - ORD
1 stop11h 25mIcelandair
Thu 19/218:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 7/1£405
Fri 13/207:40LHR - ORD
1 stop12h 30mLufthansa
Sun 22/217:50ORD - LHR
Nonstop8h 05mLufthansa
Deal found 8/1£405
Thu 22/118:40LGW - ORD
2 stops31h 30mMultiple Airlines
Wed 28/118:50ORD - LGW
1 stop17h 00mMultiple Airlines
Deal found 7/1£405
Thu 15/107:40LHR - ORD
1 stop12h 30mLufthansa
Wed 28/121:05ORD - LHR
Nonstop8h 10mLufthansa
Deal found 8/1£405
Mon 2/218:40LGW - ORD
1 stop27h 40mSWISS
Sun 8/218:50ORD - LGW
1 stop17h 00mSWISS
Deal found 7/1£406

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 January 2026.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

London

Fly to

Illinois

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 21/2

12:50-19:15

1 stop12h 25m

Chicago O'Hare Intl

Sat 28/2

20:35-10:25

Nonstop7h 50m

£401

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 27/5

06:40-16:10

1 stop15h 30m

Chicago O'Hare Intl

Sun 31/5

19:15-18:50

2 stops17h 35m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 25/1

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Mon 9/2

17:50-07:55

Nonstop8h 05m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

07:50-14:00

1 stop12h 10m

Chicago O'Hare Intl

Tue 31/3

22:25-12:15

Nonstop7h 50m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/2

13:45-16:20

1 stop32h 35m

Chicago O'Hare Intl

Thu 12/2

17:50-07:55

Nonstop8h 05m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/3

07:50-14:00

1 stop12h 10m

Chicago O'Hare Intl

Tue 10/3

19:40-08:35

Nonstop7h 55m

£402

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 8/2

12:10-19:15

1 stop13h 05m

Chicago O'Hare Intl

Sun 15/2

20:35-10:25

Nonstop7h 50m

£404

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/2

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Sun 22/2

21:15-11:15

Nonstop8h 00m

£405

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 13/2

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Fri 20/2

13:02-06:40

1 stop11h 38m

£405

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 31/1

21:45-16:55

2 stops25h 10m

Chicago O'Hare Intl

Sat 7/2

19:20-23:05

2 stops21h 45m

£411

Flights are sorted by cheapest return flights first.

Deals found on 8/1

Showing 1-10 of 60 results
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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.
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

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

Currently, December is the cheapest month in which you can book a flight from London to Illinois (average of £218). Flying from London to Illinois in July is currently the most expensive (average of £501). 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?

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 9 January 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 9 January 2026.

The most flights from LON to USIL are scheduled on a Wednesday (36 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 on average).

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 9 January 2026.
Read reviews from past customers who have flown with Finnair, United Airlines, andIcelandair from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,346 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
9,141 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Icelandair
7.1
Good
593 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,696 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,657 reviews
Finnair
7.6
Good
1,346 reviews
Check prices

Crew

8.2

Comfort

7.4

Boarding

7.7

Food

6.7

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Related info for your journey

Find useful and relevant information for your journey from London to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Illinois?

    There are many flights that can get you from London to Illinois in 12h 25m. Fly via British Airways, Scandinavian Airlines, or United Airlines to get the fastest option. Airlines will cover a distance of 3939 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 Scandinavian Airlines. According to our data, you can fly for as low as £263. Users have also found prices from £285 and £310 on Icelandair and JetBlue, respectively.

  • What are the most popular routes from London to Illinois?

    While some choose either London Heathrow - Chicago Midway or London Gatwick - 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: SWISS (88%), Austrian Airlines (87%), Brussels Airlines( 87%).

  • What are the cheapest flights from London to Illinois?

    Looking for the cheapest flight from London to Illinois? While on average our users pay £1,078, our data indicates the cheapest price to be £353. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £338.

  • 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, December is the cheapest month in which you can book a flight from London to Illinois (average of £218). Flying from London to Illinois in July is currently the most expensive (average of £501). 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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from London to Illinois

Discover the top 10 airlines that operate flights from London to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£313Average£487FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£344Average£530FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£355Average£491FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£365Average£626FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£385Average£610FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£385Average£539FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£393Average£574FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£402Average£611FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£402Average£570FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£408Average£672FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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