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Cheap flights from London to Illinois from £331

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
7 Dec — 14 Dec1
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 7 November 2025.

Round-trip from

£409

One-way from

£405

Popular in

July

Cheapest in

February

Average price

£492

Good round-trip deal

£582 or less

Good one-way deal

£460 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 24/11-8/12
  • 2 total stops
  • 32h 25m total
  • London to Illinois
Search Deals
12/11
  • 12/11
  • 3 total stops
  • 34h 56m total
  • London to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£62 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 November 2025
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 7 November 2025.

Mon 24/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Mon 8/1219:20ORD - LHR
1 stop16h 20mScandinavian Airlines
Deal found 6/11£409
Thu 4/1206:40LHR - ORD
2 stops16h 05mScandinavian Airlines
Wed 14/119:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 6/11£410
Thu 20/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Sun 23/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 5/11£412
Wed 3/1206:00LHR - ORD
1 stop15h 00mTAP AIR PORTUGAL
Sun 7/1220:25ORD - LHR
1 stop19h 10mTAP AIR PORTUGAL
Deal found 6/11£412
Mon 24/1106:30STN - ORD
2 stops16h 50mMultiple Airlines
Mon 1/1218:30ORD - STN
2 stops20h 50mMultiple Airlines
Deal found 7/11£412
Fri 5/1214:00LGW - ORD
2 stops27h 08mMultiple Airlines
Mon 8/1208:36ORD - LGW
1 stop15h 24mMultiple Airlines
Deal found 6/11£413
Fri 21/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Sat 29/1119:20ORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 5/11£415
Wed 26/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 30/1119:20ORD - LHR
1 stop17h 10mScandinavian Airlines
Deal found 6/11£416
Fri 21/1105:50LTN - ORD
2 stops17h 30mMultiple Airlines
Fri 28/1118:30ORD - LTN
2 stops19h 40mMultiple Airlines
Deal found 6/11£416
Wed 3/1206:00LHR - ORD
1 stop15h 00mTAP AIR PORTUGAL
Wed 14/119:10ORD - LHR
1 stop14h 20mTAP AIR PORTUGAL
Deal found 6/11£417
Fri 5/1210:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Thu 5/219:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 5/11£418
Fri 21/1106:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Mon 24/1119:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 5/11£419

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 7 November 2025.
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

Mon 2/3

07:05-16:45

2 stops15h 40m

Chicago O'Hare Intl

Sun 8/3

20:20-18:50

2 stops17h 30m

£410

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 24/11

06:30-17:20

2 stops16h 50m

Chicago O'Hare Intl

Mon 1/12

18:30-21:20

2 stops20h 50m

£412

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 7/2

17:30-16:55

2 stops29h 25m

Chicago O'Hare Intl

Sat 14/2

19:20-19:55

2 stops18h 35m

£412

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 1/5

18:45-16:15

1 stop27h 30m

Chicago O'Hare Intl

Sun 10/5

18:00-12:45

1 stop12h 45m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 23/11

06:40-16:45

2 stops16h 05m

Chicago O'Hare Intl

Sun 30/11

19:20-18:30

1 stop17h 10m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 20/3

07:05-17:45

2 stops15h 40m

Chicago O'Hare Intl

Sun 22/3

20:20-17:40

1 stop16h 20m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 20/11

21:05-16:45

2 stops25h 40m

Chicago O'Hare Intl

Mon 8/12

19:20-16:25

2 stops15h 05m

£425

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 5/12

05:50-17:55

1 stop18h 05m

Chicago O'Hare Intl

Fri 12/12

15:50-15:25

1 stop17h 35m

£427

LondonChicago

STN - ORD

STNORD

London Stansted

Wed 3/12

20:55-17:55

2 stops27h 00m

Chicago O'Hare Intl

Wed 10/12

15:50-18:00

2 stops20h 10m

£427

LondonChicago

STN - ORD

STNORD

London Stansted

Sun 23/11

06:30-17:55

1 stop17h 25m

Chicago O'Hare Intl

Sun 30/11

19:40-16:35

1 stop14h 55m

£428

Flights are sorted by cheapest return flights first.

Deals found on 6/11

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, March is the cheapest month in which you can book a flight from London to Illinois (average of £309). Flying from London to Illinois in July is currently the most expensive (average of £514). 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 7 November 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 23% on flights from London to Illinois by exploring options for tickets in the evening.

What is the cheapest day to fly from London to Illinois?

Use this chart to determine the cheapest time to fly return from London to Illinois. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Illinois flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 7 November 2025.

The most flights from LON to USIL are scheduled on a Thursday (42 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (29 on average).

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 7 November 2025.
Read reviews from past customers who have flown with Finnair, Aer Lingus, 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
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
1,335 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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.
Aer Lingus
7.2
Good
1,365 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
572 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
7,558 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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
7,500 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Crew

8.1

Comfort

7.4

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 11h 25m. Fly via Scandinavian Airlines, TAP AIR PORTUGAL, or Icelandair 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 British Airways. According to our data, you can fly for as low as £331. Users have also found prices from £350 and £350 on Air Canada and Virgin Atlantic, respectively.

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

    While some choose either London Gatwick - Chicago O'Hare Intl or London Heathrow - Chicago Midway, 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 (84%), Austrian Airlines (84%), United Airlines( 84%).

  • What are the cheapest flights from London to Illinois?

    Looking for the cheapest flight from London to Illinois? While on average our users pay £1,300, our data indicates the cheapest price to be £372. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £323.

  • 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, March is the cheapest month in which you can book a flight from London to Illinois (average of £309). Flying from London to Illinois in July is currently the most expensive (average of £514). 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£322Average£499FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£354Average£572FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£369Average£492FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£378Average£626FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£379Average£604FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest£396Average£554FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£406Average£590FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£414Average£582FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£414Average£617FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£418Average£685FlexibilityNo 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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