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Cheap flights from London to Illinois from £296

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
26 Jan — 2 Feb1
1 adult

Cheap flight deals from London to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.

Round-trip from

£433

One-way from

£296

Good round-trip deal

£555 or less

Good one-way deal

£614 or less
Lufthansa
  • Lufthansa
  • 13/3-27/3
  • 1 total stop
  • 20h 35m total
  • London to Illinois
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12/5
  • 12/5
  • 3 total stops
  • 41h 57m total
  • London to Illinois
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.
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Find flight deals from London to Illinois

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 21 January 2025.

Thu 13/307:40LHR - ORD
1 stop12h 30mLufthansa
Thu 27/318:50ORD - LHR
Nonstop8h 05mLufthansa
Deal found 21/1£433
Wed 19/219:50LHR - ORD
2 stops28h 00mScandinavian Airlines
Sun 2/319:40ORD - LHR
1 stop16h 00mScandinavian Airlines
Deal found 21/1£433
Mon 23/615:40LGW - ORD
1 stop11h 35mIcelandair
Mon 7/722:15ORD - LGW
1 stop10h 25mIcelandair
Deal found 21/1£436
Wed 19/206:15LHR - ORD
1 stop14h 15mBritish Airways
Wed 26/321:15ORD - LHR
Nonstop7h 45mBritish Airways
Deal found 21/1£436
Thu 20/319:25LHR - ORD
1 stop24h 40mAustrian Airlines
Tue 25/318:50ORD - LHR
Nonstop8h 05mAustrian Airlines
Deal found 21/1£437
Tue 13/518:45LHR - ORD
1 stop27h 25mTAP AIR PORTUGAL
Sat 17/518:15ORD - LHR
1 stop22h 40mTAP AIR PORTUGAL
Deal found 21/1£438
Thu 6/306:50LTN - ORD
2 stops19h 05mMultiple Airlines
Thu 13/307:20ORD - LTN
3 stops27h 20mMultiple Airlines
Deal found 20/1£438
Wed 5/314:10LHR - ORD
Nonstop8h 50mFinnair
Sun 9/316:27ORD - LHR
1 stop14h 13mFinnair
Deal found 21/1£438
Wed 19/211:55LHR - ORD
Nonstop8h 50mAmerican Airlines
Wed 26/321:15ORD - LHR
Nonstop7h 45mAmerican Airlines
Deal found 21/1£439
Wed 26/206:50LHR - ORD
2 stops13h 55mMultiple Airlines
Wed 26/311:04ORD - LHR
2 stops15h 06mMultiple Airlines
Deal found 21/1£440
Mon 3/218:45LGW - ORD
1 stop27h 30mSWISS
Mon 17/219:05ORD - LGW
1 stop16h 45mSWISS
Deal found 21/1£441
Wed 19/209:25LCY - ORD
1 stop12h 50mSWISS
Wed 26/219:05ORD - LCY
1 stop17h 35mSWISS
Deal found 20/1£441

Find flights from London to Illinois within your budget

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 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 13/3

07:40-15:10

1 stop12h 30m

Chicago O'Hare Intl

Thu 27/3

18:50-07:55

Nonstop8h 05m

£433

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 19/2

19:50-17:50

2 stops28h 00m

Chicago O'Hare Intl

Sun 2/3

19:40-17:40

1 stop16h 00m

£433

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 23/6

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Mon 7/7

22:15-14:40

1 stop10h 25m

£436

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 19/2

06:15-14:30

1 stop14h 15m

Chicago O'Hare Intl

Wed 26/3

21:15-10:00

Nonstop7h 45m

£436

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 20/3

19:25-15:05

1 stop24h 40m

Chicago O'Hare Intl

Tue 25/3

18:50-07:55

Nonstop8h 05m

£437

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 13/5

18:45-16:10

1 stop27h 25m

Chicago O'Hare Intl

Sat 17/5

18:15-22:55

1 stop22h 40m

£438

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 6/3

06:50-19:55

2 stops19h 05m

Chicago O'Hare Intl

Thu 13/3

07:20-15:40

3 stops27h 20m

£438

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 5/3

14:10-17:00

Nonstop8h 50m

Chicago O'Hare Intl

Sun 9/3

16:27-11:40

1 stop14h 13m

£438

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 19/2

14:10-17:00

Nonstop8h 50m

Chicago O'Hare Intl

Wed 26/3

21:15-10:00

Nonstop7h 45m

£439

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 26/2

06:50-14:45

2 stops13h 55m

Chicago O'Hare Intl

Wed 26/3

11:04-07:10

2 stops15h 06m

£440

Flights are sorted by cheapest return flights first.

Deals found on 21/1

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.

Travel insights for flights from London to Illinois

Get recent, data-driven insights about flights from London to Illinois including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from London to Illinois (average of £595). Flying from London to Illinois in July is currently the most expensive (average of £843). 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 21 January 2025.

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 21 January 2025.

The most flights from LON to USIL are scheduled on a Monday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

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.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

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).

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 21 January 2025.
To help decide which airline to fly from London to Illinois, see what other customers have to say about Lufthansa, British Airways and American Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,521 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT
7.6
Good
1,117 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

8.0

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • 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 £355. Users have also found prices from £359 and £414 on Aer Lingus 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 City - 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 (93%), Austrian Airlines (93%), United Airlines( 93%).

  • What are the cheapest flights from London to Illinois?

    Looking for the cheapest flight from London to Illinois? While on average our users pay £1,242, our data indicates the cheapest price to be £452. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £339.

  • 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, January is the cheapest month in which you can book a flight from London to Illinois (average of £595). Flying from London to Illinois in July is currently the most expensive (average of £843). 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

Browse thousands of different options on Cheapflights for your next trip

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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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£345Average£528FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£386Average£542FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£398Average£579FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£418Average£618FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£437Average£679FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£450Average£601FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£462Average£613FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
United AirlinesCheapest£475Average£641FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£484Average£849FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£487Average£663FlexibilityNo cancel feeOn-time77%
Search Iberia 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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