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Cheap flights from London to Illinois from £246

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
9 Apr — 16 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 10 March 2026.

Tue 14/419:30
LHR
-
ORD
1 stop26h 40m
Scandinavian Airlines
Mon 27/419:15
ORD
-
LHR
1 stop14h 45m
Scandinavian Airlines
Deal found 6/3£424
Thu 29/1018:40
LHR
-
ORD
1 stop28h 05m
Scandinavian Airlines
Mon 2/1119:20
ORD
-
LHR
1 stop32h 00m
Scandinavian Airlines
Deal found 5/3£424
Thu 16/419:30
LHR
-
ORD
1 stop26h 40m
Scandinavian Airlines
Mon 27/419:15
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Deal found 5/3£425
Thu 4/613:00
LGW
-
ORD
1 stop11h 15m
Icelandair
Tue 4/819:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 5/3£427
Tue 31/318:45
LHR
-
ORD
1 stop27h 15m
TAP AIR PORTUGAL
Sun 12/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Deal found 5/3£427
Thu 4/613:00
LGW
-
ORD
1 stop11h 15m
Icelandair
Mon 3/822:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 5/3£428
Fri 29/513:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Thu 30/719:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 5/3£428
Fri 29/506:40
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Mon 3/819:15
ORD
-
LHR
1 stop16h 25m
Scandinavian Airlines
Deal found 5/3£429
Mon 1/613:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Tue 28/719:25
ORD
-
LHR
1 stop10h 30m
Icelandair
Deal found 5/3£430
Tue 24/316:25
LGW
-
ORD
2 stops36h 57m
Multiple Airlines
Tue 31/308:06
ORD
-
LGW
1 stop16h 14m
Multiple Airlines
Deal found 5/3£432
Wed 22/415:15
LHR
-
ORD
Nonstop9h 00m
British Airways
Tue 28/419:05
ORD
-
LHR
Nonstop8h 00m
British Airways
Deal found 5/3£432
Tue 17/311:55
LGW
-
ORD
1 stop11h 25m
Icelandair
Mon 20/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 5/3£433

Find flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated 10 March 2026.

Round-trip from

£424

One-way from

£246

Popular in

July

Cheapest in

September

Average price

£546

Good round-trip deal

£585 or less

Good one-way deal

£420 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 14/4-27/4
  • 2 total stops
  • 41h 25m total
  • London to Illinois
Search Deals
27/4
  • 27/4
  • 3 total stops
  • 54h 30m total
  • London to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 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 March 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

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 10 March 2026.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 15/4

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Mon 27/4

19:15-16:25

2 stops15h 10m

£445

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 17/4

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Sun 19/4

22:25-14:40

1 stop10h 15m

£470

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 13/4

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Mon 27/4

15:45-12:45

1 stop15h 00m

£487

LondonChicago

LTN - ORD

LTNORD

London Luton

Tue 7/4

13:10-19:15

1 stop12h 05m

Chicago O'Hare Intl

Tue 14/4

21:00-13:25

1 stop10h 25m

£493

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Wed 22/4

14:00-07:26

1 stop23h 26m

Chicago Midway

Sun 26/4

14:00-10:00

1 stop14h 00m

£499

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

06:55-14:00

1 stop13h 05m

Chicago O'Hare Intl

Thu 23/4

18:10-08:30

Nonstop8h 20m

£504

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Wed 25/3

07:55-13:02

2 stops34h 07m

Chicago Midway

Sun 29/3

09:30-06:20

1 stop14h 50m

£515

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 23/4

13:00-19:15

1 stop12h 15m

Chicago O'Hare Intl

Tue 12/5

15:45-09:15

1 stop11h 30m

£522

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

09:05-13:20

1 stop34h 15m

Chicago O'Hare Intl

Mon 27/4

18:10-08:30

Nonstop8h 20m

£534

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 23/4

06:55-14:00

1 stop13h 05m

Chicago O'Hare Intl

Tue 12/5

21:30-11:45

Nonstop8h 15m

£534

Flights are sorted by cheapest return flights first.

Deals found on 6/3

Showing 1-10 of 60 resultsSorted by cheapest first
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2
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6

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 £219). Flying from London to Illinois in July is currently the most expensive (average of £493). 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 10 March 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 10 March 2026.

The most flights from LON to USIL are scheduled on a Tuesday (42 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (32 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 10 March 2026.
Read reviews from past customers who have flown with Austrian Airlines,United Airlines, andIcelandair from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Austrian Airlines
7.6
Good
900 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
United Airlines
7.4
Good
9,409 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Icelandair
7.1
Good
619 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Lufthansa
6.8
Okay
7,840 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
British Airways
6.7
Okay
7,781 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Entertainment

6.8

Overall

7.6

Boarding

7.6

Crew

8.1

Food

6.8

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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 13h 05m. Fly via Scandinavian Airlines, United Airlines, or Austrian 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 Icelandair. According to our data, you can fly for as low as £261. Users have also found prices from £312 and £330 on JetBlue and British Airways, 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: Air Canada (95%), Brussels Airlines (95%), Lufthansa( 95%).

  • What are the cheapest flights from London to Illinois?

    Looking for the cheapest flight from London to Illinois? While on average our users pay £1,206, our data indicates the cheapest price to be £364. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £387.

  • 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 £219). Flying from London to Illinois in July is currently the most expensive (average of £493). 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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Heathrow to Tampa flights
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Manchester to LaGuardia flights
London City to Miami flights
Heathrow to Baltimore flights
Heathrow to George Bush Intcntl flights
London City to Boston flights
Stansted to Boston flights
Heathrow to Denver flights
Heathrow to Ontario flights
Heathrow to Nashville flights
Gatwick to Las Vegas flights
London City to Orlando flights
Gatwick to Dallas/Fort Worth flights

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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£346Average£547FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£347Average£486FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£365Average£630FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£372Average£575FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£377Average£510FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£388Average£545FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£397Average£584FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£401Average£572FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£406Average£622FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£413Average£712FlexibilityNo 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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