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Cheap flights from London to Illinois from £379

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
24 Dec — 31 Dec1
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 19 December 2024.

Round-trip from

£457

One-way from

£379
Icelandair
  • Icelandair
  • 17/1-24/1
  • 2 total stops
  • 21h 50m total
  • London to Illinois
Search Deals
17/3
  • 17/3
  • 1 total stop
  • 15h 40m total
  • London to Illinois
Search Deals

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 19 December 2024.

Sun 29/1218:40LHR - ORD
1 stop27h 10mScandinavian Airlines
Sun 19/119:10ORD - LHR
1 stop20h 30mScandinavian Airlines
Deal found 17/12£502
Tue 31/1212:25LHR - ORD
1 stop27h 45mIberia
Mon 6/115:59ORD - LHR
1 stop24h 11mIberia
Deal found 18/12£514
Wed 25/1206:00LHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Wed 8/119:15ORD - LHR
1 stop14h 15mTAP AIR PORTUGAL
Deal found 17/12£527
Tue 31/1211:55LHR - ORD
Nonstop8h 50mFinnair
Mon 6/116:43ORD - LHR
1 stop23h 27mFinnair
Deal found 18/12£554
Thu 26/1219:35LGW - ORD
1 stop24h 55mIberia
Wed 29/116:45ORD - LGW
1 stop11h 30mIberia
Deal found 18/12£558
Tue 31/1209:10LHR - ORD
1 stop13h 59mDelta
Thu 22/513:50ORD - LHR
1 stop10h 55mDelta
Deal found 17/12£560
Thu 26/1219:10LCY - ORD
1 stop27h 05mSWISS
Wed 29/119:05ORD - LCY
1 stop11h 45mSWISS
Deal found 18/12£562
Sat 28/1208:40LCY - ORD
1 stop11h 50mKLM
Thu 8/516:20ORD - LCY
1 stop10h 30mKLM
Deal found 18/12£573
Wed 25/1218:45LGW - ORD
1 stop24h 10mSWISS
Wed 29/118:20ORD - LGW
2 stops17h 30mSWISS
Deal found 18/12£584
Tue 31/1213:10LHR - ORD
1 stop12h 57mAmerican Airlines
Fri 23/522:55ORD - LHR
Nonstop7h 50mAmerican Airlines
Deal found 17/12£590
Tue 31/1214:30LHR - ORD
1 stop13h 43mUnited Airlines
Tue 27/521:25ORD - LHR
Nonstop8h 20mUnited Airlines
Deal found 17/12£594
Tue 31/1213:10LHR - ORD
1 stop12h 52mBritish Airways
Thu 22/517:00ORD - LHR
Nonstop7h 55mBritish Airways
Deal found 17/12£610

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 19 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 16/1

13:55-15:50

2 stops31h 55m

Chicago O'Hare Intl

Fri 31/1

19:40-18:30

2 stops16h 50m

£457

LondonChicago

LTN - ORD

LTNORD

London Luton

Sat 1/2

06:00-17:20

2 stops17h 20m

Chicago O'Hare Intl

Sat 8/2

18:30-20:55

2 stops20h 25m

£458

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 16/1

06:50-10:54

2 stops34h 04m

Chicago O'Hare Intl

Thu 30/1

19:05-22:00

2 stops20h 55m

£459

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/2

17:05-07:30

1 stop20h 25m

Chicago O'Hare Intl

Wed 19/2

21:56-11:40

Nonstop7h 44m

£460

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 14/1

07:30-15:15

1 stop13h 45m

Chicago O'Hare Intl

Sat 18/1

20:40-06:30

1 stop27h 50m

£461

LondonChicago

LCY - ORD

LCYORD

London City

Mon 3/2

09:15-16:15

1 stop13h 00m

Chicago O'Hare Intl

Mon 17/2

19:05-12:50

1 stop11h 45m

£461

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 23/4

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Wed 30/4

19:30-14:40

1 stop13h 10m

£462

LondonChicago

LCY - ORD

LCYORD

London City

Mon 3/2

09:20-14:30

1 stop11h 10m

Chicago O'Hare Intl

Wed 12/2

16:25-09:30

1 stop11h 05m

£462

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 31/12

12:25-10:10

1 stop27h 45m

Chicago O'Hare Intl

Tue 28/1

18:35-08:15

Nonstop7h 40m

£462

LondonChicago

LCY - MDW

LCYMDW

London City

Tue 11/2

10:00-18:11

2 stops14h 11m

Chicago Midway

Thu 20/2

09:33-08:10

2 stops16h 37m

£464

Flights are sorted by cheapest return flights first.

Deals found on 18/12

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 19 December 2024.

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 19 December 2024.

The most flights from LON to USIL are scheduled on a Monday (38 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 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 19 December 2024.
To help decide which airline to fly from London to Illinois, see what other customers have to say about Lufthansa, TAP AIR PORTUGAL and United 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
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
8,604 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
1,349 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
7.7
Good
1,285 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
1,129 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 10

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

SWISS
7.6
Good
1,605 reviews
Delta
8.0
Very Good
8,604 reviews
Check prices

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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 Aer Lingus. According to our data, you can fly for as low as £380. Users have also found prices from £386 and £398 on Icelandair and WestJet, 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: SWISS (89%), Air Canada (86%), Austrian Airlines( 86%).

  • What are the cheapest flights from London to Illinois?

    Looking for the cheapest flight from London to Illinois? While on average our users pay £1,434, our data indicates the cheapest price to be £487. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £381.

  • 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

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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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London City to Orlando flights
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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 19 December 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£334Average£511FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£378Average£509FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£384Average£568FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£405Average£607FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£423Average£708FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£439Average£585FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£448Average£595FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest£468Average£703FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£471Average£642FlexibilityNo cancel feeOn-time77%
Search Iberia flights
American AirlinesCheapest£476Average£644FlexibilityNo cancel feeOn-time71%
Search American 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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