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$311+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ORD
feb. 13 — feb. 201
vie. 2/13
vie. 2/20
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 enero 14, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$533
(TravelUp)

One-way from

$311
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$624

Good round-trip deal

$731 or less

Good one-way deal

$636 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. 14% potential increase in price ($119 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 14, 2026.

This deal was found by Cheapflights users on 1/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/14:25 pm
LHR
-
STL
Nonstop9h 05m
British Airways
mié. 9/169:35 pm
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 1/12$496
This TravelUp deal was found by Cheapflights users on 1/14. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/1112:10 pm
LHR
-
ORD
1 stop13h 05m
British Airways
mié. 2/186:30 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 1/14$533
This The Travel House deal was found by Cheapflights users on 1/13. 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.
sáb. 9/59:25 pm
LHR
-
ORD
1 stop26h 50m
Icelandair
sáb. 9/1210:25 pm
ORD
-
LHR
1 stop15h 55m
Icelandair
Deal found 1/13$534
This Cheapflightsfares deal was found by Cheapflights users on 1/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/512:10 pm
LHR
-
ORD
1 stop13h 05m
British Airways
jue. 2/126:30 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 1/13$535
This flugladen.de deal was found by Cheapflights users on 1/14. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 1/224:00 pm
LGW
-
ORD
1 stop29h 25m
TAP AIR PORTUGAL
mié. 2/47:10 pm
ORD
-
LGW
1 stop13h 55m
TAP AIR PORTUGAL
Deal found 1/14$536
This Expedia deal was found by Cheapflights users on 1/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/1012:10 pm
LHR
-
ORD
1 stop13h 05m
British Airways
mar. 2/176:30 pm
ORD
-
LHR
Nonstop7h 45m
British Airways
Deal found 1/13$536
This Flightnetwork deal was found by Cheapflights users on 1/12. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 1/226:40 pm
LGW
-
ORD
2 stops50h 15m
Multiple Airlines
mié. 1/287:15 am
ORD
-
LGW
2 stops28h 35m
Multiple Airlines
Deal found 1/12$537
This Cheapflightsfares deal was found by Cheapflights users on 1/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/77:40 am
LHR
-
ORD
1 stop12h 30m
Lufthansa
dom. 2/223:45 pm
ORD
-
LHR
Nonstop8h 10m
Lufthansa
Deal found 1/13$537
This Gotogate deal was found by Cheapflights users on 1/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/2611:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
dom. 3/87:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/12$538
This British Airways deal was found by Cheapflights users on 1/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/712:50 pm
LHR
-
ORD
1 stop12h 25m
British Airways
dom. 2/229:00 pm
ORD
-
LHR
1 stop12h 35m
British Airways
Deal found 1/13$538
This TravelUp deal was found by Cheapflights users on 1/13. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 1/2412:50 pm
LHR
-
ORD
1 stop12h 25m
British Airways
lun. 1/268:45 pm
ORD
-
LHR
Nonstop7h 40m
British Airways
Deal found 1/13$539
This Travelis deal was found by Cheapflights users on 1/14. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 1/306:30 am
LHR
-
STL
1 stop13h 25m
Lufthansa
jue. 2/121:11 pm
STL
-
LHR
1 stop12h 44m
Lufthansa
Deal found 1/14$540

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 enero 14, 2026.
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

sáb. 2/7

12:50 pm-7:15 pm

1 stop12h 25m

Chicago O'Hare Intl

dom. 2/22

9:00 pm-3:35 pm

1 stop12h 35m

$538

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 2/12

9:00 am-4:20 pm

1 stop13h 20m

Chicago O'Hare Intl

jue. 2/19

2:30 pm-6:40 am

1 stop10h 10m

$540

LondonChicago

LHR - ORD

LHRORD

London Heathrow

sáb. 2/7

12:50 pm-7:15 pm

1 stop12h 25m

Chicago O'Hare Intl

mié. 2/18

4:10 pm-9:40 am

1 stop11h 30m

$540

LondonChicago

LHR - ORD

LHRORD

London Heathrow

lun. 3/16

7:50 am-3:00 pm

1 stop12h 10m

Chicago O'Hare Intl

lun. 3/23

8:40 pm-11:25 am

1 stop9h 45m

$540

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 1/29

12:10 pm-7:15 pm

1 stop13h 05m

Chicago O'Hare Intl

lun. 2/2

6:25 pm-8:15 am

Nonstop7h 50m

$540

LondonChicago

LGW - ORD

LGWORD

London Gatwick

lun. 3/16

11:55 am-6:20 pm

1 stop11h 25m

Chicago O'Hare Intl

lun. 3/23

7:30 pm-10:55 am

1 stop10h 25m

$556

LondonChicago

LHR - ORD

LHRORD

London Heathrow

jue. 2/12

6:40 am-4:45 pm

1 stop16h 05m

Chicago O'Hare Intl

jue. 2/19

7:20 pm-4:25 pm

2 stops15h 05m

$556

LondonChicago

LHR - ORD

LHRORD

London Heathrow

sáb. 2/7

6:35 am-2:10 pm

1 stop13h 35m

Chicago O'Hare Intl

sáb. 2/21

8:07 pm-9:40 am

1 stop31h 33m

$560

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

jue. 2/5

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

dom. 2/8

5:42 pm-10:00 am

1 stop34h 18m

$565

LondonChicago

LHR - ORD

LHRORD

London Heathrow

vie. 2/20

7:05 am-4:45 pm

2 stops15h 40m

Chicago O'Hare Intl

dom. 3/1

7:20 pm-6:50 pm

2 stops17h 30m

$567

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

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, December is the cheapest month in which you can book a flight from London to Illinois (average of $293). 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 enero 14, 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 enero 14, 2026.

The most flights from LON to USIL are scheduled on a Wednesday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (34 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 enero 14, 2026.
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
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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
7.5
Good
893 reviews
Austrian Airlines
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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
9,157 reviews
Austrian Airlines
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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
American Airlines
7.2
Good
11,122 reviews
Austrian Airlines
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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
596 reviews
Austrian Airlines
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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
7,671 reviews
Austrian Airlines
7.5
Good
893 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Overall

7.5

Boarding

7.6

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 11h 25m. Fly via British Airways, United Airlines, or Icelandair 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 Scandinavian Airlines, which is currently one of the cheapest options available, starting at $288. TAP AIR PORTUGAL flights start at $393 while deals on Icelandair start at $472 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 SWISS (88%), Austrian Airlines (87%) or Brussels Airlines (87%) 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 $502. On average you can expect to pay $1,519. The most popular route, (London Heathrow - Chicago O'Hare Intl), can usually be booked for $337.

  • 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, December is the cheapest month in which you can book a flight from London to Illinois (average of $293). 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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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 enero 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$672FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$453Average$576FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$485Average$647FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$552Average$770FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$784FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$778FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$777FlexibilityNo cancel feeOn-time71%
FinnairCheapest$576Average$733FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$720Average$838FlexibilityNo cancel feeOn-time76%

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