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$341+ Cheap flights from London (LON) to Illinois

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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
Nov 12 — Nov 191
Wed 11/12
Wed 11/19
1 adult, Economy
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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 October 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$529
(The Travel House)

One-way from

$341
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$720

Good round-trip deal

$581 or less

Good one-way deal

$586 or less
Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.
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From London (LON) to Illinois
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One-way flight from London (LON) to Illinois
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Highest demand for flights based on searches. 13% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from London (LON) to Illinois.
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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 October 13, 2025.

This The Travel House deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Wed 11/127:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/11$529
This Mytrip deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:50 amLGW - ORD
2 stops14h 30mMultiple Airlines
Tue 11/186:30 pmORD - LGW
2 stops18h 00mMultiple Airlines
Deal found 10/12$530
This Scandinavian Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Mon 11/177:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 10/11$530
This Mytrip deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/119:00 amLTN - ORD
2 stops14h 20mMultiple Airlines
Tue 11/186:30 pmORD - LTN
2 stops19h 35mMultiple Airlines
Deal found 10/12$530
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/258:30 amSTN - ORD
2 stops14h 50mMultiple Airlines
Tue 12/26:30 pmORD - STN
2 stops20h 50mMultiple Airlines
Deal found 10/11$530
This Justfly.com deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:00 pmLGW - ORD
1 stop29h 25mTAP AIR PORTUGAL
Wed 11/127:10 pmORD - LGW
1 stop13h 55mTAP AIR PORTUGAL
Deal found 10/11$531
This oojo deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Thu 12/47:20 pmORD - LHR
2 stops15h 40mScandinavian Airlines
Deal found 10/11$531
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/119:00 amLTN - ORD
2 stops14h 20mMultiple Airlines
Sun 11/166:30 pmORD - LTN
2 stops21h 30mMultiple Airlines
Deal found 10/11$531
This FlightHub deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:00 pmLGW - ORD
1 stop29h 25mTAP AIR PORTUGAL
Fri 11/288:15 pmORD - LGW
1 stop13h 30mTAP AIR PORTUGAL
Deal found 10/11$532
This Scandinavian Airlines deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Sun 11/97:20 pmORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 10/11$532
This Mytrip deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:30 amSTN - ORD
2 stops16h 50mMultiple Airlines
Tue 11/186:30 pmORD - STN
2 stops20h 50mMultiple Airlines
Deal found 10/12$532
This Kiwi.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:00 pmLGW - MDW
1 stop14h 20mMultiple Airlines
Tue 11/116:26 pmMDW - LGW
2 stops32h 59mMultiple Airlines
Deal found 10/10$533

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated October 13, 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 11/10

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Mon 11/17

7:20 pm-6:50 pm

2 stops17h 30m

$530

LondonChicago

STN - ORD

STNORD

London Stansted

Sat 11/8

8:30 am-5:20 pm

2 stops14h 50m

Chicago O'Hare Intl

Wed 11/12

6:30 pm-3:05 pm

2 stops14h 35m

$531

LondonChicago

STN - ORD

STNORD

London Stansted

Tue 11/11

6:30 am-5:20 pm

2 stops16h 50m

Chicago O'Hare Intl

Tue 11/18

6:30 pm-9:20 pm

2 stops20h 50m

$532

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 11/6

6:30 am-5:20 pm

2 stops16h 50m

Chicago O'Hare Intl

Mon 11/10

6:30 pm-9:20 pm

2 stops20h 50m

$532

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Fri 11/7

2:00 pm-10:20 pm

1 stop14h 20m

Chicago Midway

Tue 11/11

6:26 pm-9:25 am

2 stops32h 59m

$533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/7

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Fri 11/14

7:20 pm-6:30 pm

2 stops17h 10m

$541

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 11/6

9:20 pm-3:10 pm

2 stops23h 50m

Chicago O'Hare Intl

Fri 11/14

5:20 pm-6:30 pm

2 stops19h 10m

$545

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/7

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

Wed 11/12

7:20 pm-4:00 pm

1 stop14h 40m

$557

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 11/25

7:50 pm-4:45 pm

2 stops26h 55m

Chicago O'Hare Intl

Wed 12/3

7:20 pm-4:25 pm

2 stops15h 05m

$570

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 11/19

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Wed 11/26

6:30 pm-10:55 am

1 stop10h 25m

$571

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/11

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 round-trip 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 $404). Flying from London to Illinois in July is currently the most expensive (average of $673). 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 October 13, 2025.

It’s optimal to fly from London to Illinois in the evening. By choosing this option you can save up to 41% on the cost of your flight, compared to a flight in the afternoon.

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 October 13, 2025.

The most flights from LON to USIL are scheduled on a Saturday (54 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (47 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 October 13, 2025.
See what other customers who have flown with Austrian Airlines, United Airlines, and American Airlines from London to Illinois have to say. 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.
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
853 reviews
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
United Airlines
7.4
Good
8,973 reviews
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
American Airlines
7.2
Good
11,042 reviews
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Icelandair
7.0
Good
555 reviews
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
British Airways
6.7
Okay
7,453 reviews
Austrian Airlines
7.6
Good
853 reviews

Overall

7.6

Boarding

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

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, Icelandair, or SWISS to get the fastest option. There are 3960 mi between London and Illinois. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London to Illinois one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $522. British Airways flights start at $522 while deals on TAP AIR PORTUGAL start at $522 one-way.

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

    The most popular route from London to Illinois is London Heathrow - Chicago O'Hare Intl. You may also consider London Gatwick - Chicago O'Hare Intl or London Heathrow - Chicago Midway.

  • What are the most reliable airlines from London to Illinois?

    Consider Malaysia Airlines (80%), Air Canada (79%) or Austrian Airlines (79%) when booking your flight. These represent the most reliable airlines when flying from London to Illinois.

  • What are the cheapest flights from London to Illinois?

    The cheapest flight price from London to Illinois is $532. On average you can expect to pay $1,533. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $500.

  • 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 vacation 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 $404). Flying from London to Illinois in July is currently the most expensive (average of $673). 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 Newark 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 2,558,603 searches. Data last updated October 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$561FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$453Average$683FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$729FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$943FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$554Average$767FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$572Average$799FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$793FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$852FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$795FlexibilityNo cancel feeOn-time76%

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