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$392+ Cheap flights from the United Kingdom 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from United Kingdom to Illinois

Cheapest flights from United Kingdom to Illinois
Explore the most affordable flight options available from United Kingdom to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Gotogate deal was found by Cheapflights users on 10/28. 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.
Mon 11/177:05 amLHR - ORD
2 stops15h 40mScandinavian Airlines
Fri 2/67:20 pmORD - LHR
1 stop32h 00mScandinavian Airlines
Deal found 10/28$532
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Thu 11/136:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
Sun 11/237:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/29$533
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Wed 11/266:50 amLTN - ORD
2 stops16h 30mMultiple Airlines
Wed 12/36:30 pmORD - LTN
2 stops22h 35mMultiple Airlines
Deal found 10/29$533
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Wed 11/266:30 amSTN - ORD
2 stops16h 50mMultiple Airlines
Wed 12/36:30 pmORD - STN
2 stops22h 20mMultiple Airlines
Deal found 10/29$533
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Thu 12/48:50 amLGW - ORD
2 stops14h 30mMultiple Airlines
Mon 12/86:30 pmORD - LGW
2 stops20h 30mMultiple Airlines
Deal found 10/29$534
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Wed 11/1910:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Wed 11/267:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/30$534
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Thu 12/46:30 amSTN - ORD
2 stops16h 50mMultiple Airlines
Mon 12/86:30 pmORD - STN
2 stops17h 50mMultiple Airlines
Deal found 10/28$534
This Mytrip deal was found by Cheapflights users on 10/28. 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 11/49:20 pmSTN - ORD
2 stops21h 50mMultiple Airlines
Wed 11/124:20 pmORD - STN
2 stops22h 35mMultiple Airlines
Deal found 10/28$535
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Mon 11/172:00 pmLGW - ORD
2 stops34h 34mMultiple Airlines
Fri 2/610:18 amORD - LGW
1 stop17h 42mMultiple Airlines
Deal found 10/30$536
This Booking.com deal was found by Cheapflights users on 10/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Sun 11/167:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/28$536
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Thu 11/139:05 pmLHR - ORD
2 stops25h 40mScandinavian Airlines
Sun 11/167:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 10/30$537
This The Travel House deal was found by Cheapflights users on 10/29. 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.
Sun 11/1610:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
Sun 11/237:20 pmORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 10/29$538

Cheap flight deals from United Kingdom to Illinois

Keep the following information in mind while searching for United Kingdom to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$532
(Gotogate)

One-way from

$392
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$731

Good round-trip deal

$717 or less

Good one-way deal

$594 or less
Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.
Search Deals
From United Kingdom to Illinois
Search Deals
One-way flight from United Kingdom to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from United Kingdom to Illinois.
Search Deals
Price to beat on a one-way flight from United Kingdom to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom 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 30, 2025.
Use the filters below to find and compare flights from the United Kingdom to Illinois that are best for you.

Fly from

United Kingdom

Fly to

Illinois

Route

Depart

Return

Price

LondonChicago

STN - ORD

STNORD

London Stansted

Thu 12/4

6:30 am-5:20 pm

2 stops16h 50m

Chicago O'Hare Intl

Mon 12/8

6:30 pm-9:20 pm

2 stops20h 50m

$533

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 1/21

7:50 pm-4:45 pm

2 stops26h 55m

Chicago O'Hare Intl

Sat 1/24

7:20 pm-6:50 pm

2 stops17h 30m

$542

LondonChicago

LTN - ORD

LTNORD

London Luton

Wed 11/12

6:50 am-5:20 pm

2 stops16h 30m

Chicago O'Hare Intl

Sun 11/16

6:30 pm-10:00 pm

2 stops21h 30m

$555

ManchesterChicago

MAN - ORD

MANORD

Manchester

Tue 11/18

12:55 pm-4:45 pm

2 stops33h 50m

Chicago O'Hare Intl

Mon 12/1

7:20 pm-5:55 pm

2 stops16h 35m

$561

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 11/24

6:00 am-2:00 pm

1 stop14h 00m

Chicago O'Hare Intl

Fri 11/28

7:40 pm-3:25 pm

1 stop13h 45m

$563

LondonChicago

STN - ORD

STNORD

London Stansted

Mon 11/24

6:30 am-2:00 pm

1 stop13h 30m

Chicago O'Hare Intl

Fri 11/28

7:40 pm-4:35 pm

1 stop14h 55m

$563

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/20

6:40 am-5:45 pm

2 stops16h 05m

Chicago O'Hare Intl

Sun 3/22

8:20 pm-6:50 pm

2 stops17h 30m

$565

ManchesterChicago

MAN - ORD

MANORD

Manchester

Mon 11/24

10:10 am-4:45 pm

1 stop12h 35m

Chicago O'Hare Intl

Mon 12/1

7:20 pm-6:35 pm

1 stop17h 15m

$570

ManchesterChicago

MAN - ORD

MANORD

Manchester

Mon 11/24

10:10 am-4:45 pm

1 stop12h 35m

Chicago O'Hare Intl

Fri 11/28

7:20 pm-9:30 am

1 stop32h 10m

$570

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 12/8

8:50 am-2:00 pm

1 stop11h 10m

Chicago O'Hare Intl

Tue 12/23

3:50 pm-9:45 am

1 stop11h 55m

$587

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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Best time to book a flight from United Kingdom to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from United Kingdom 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 the United Kingdom to Illinois

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

Currently, September is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of $204). Flying from United Kingdom to Illinois in July is currently the most expensive (average of $626). 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 GB to IL?

Find hourly flight availability from United Kingdom 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 30, 2025.

A simple way to save on the total cost of your ticket is to fly from United Kingdom to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight in the morning.

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 30, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Aer Lingus from the United Kingdom to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
American Airlines
7.2
Good
11,032 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Aer Lingus
7.2
Good
1,361 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
Icelandair
7.1
Good
562 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.
British Airways
6.7
Okay
7,487 reviews
United Airlines
7.4
Good
8,998 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Food

6.6

Crew

8.1

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2025

YUL - ORD

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom 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 United Kingdom to Illinois?

    Departing from United Kingdom to Illinois will take you 11h 25m. Airlines will cover a distance of 3960 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $511 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Lufthansa and United Airlines, with prices starting from $517 and $523, respectively.

  • Can I find deals for flights from United Kingdom to Illinois that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Illinois.

  • Can I find deals for business class flights from United Kingdom to Illinois?

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Illinois?

    Currently, September is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of $204). Flying from United Kingdom to Illinois in July is currently the most expensive (average of $626). 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 United Kingdom 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 United Kingdom to Illinois

Discover the top 10 airlines that operate flights from United Kingdom 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$710FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$446Average$793FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$811FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$531Average$775FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$572Average$816FlexibilityNo cancel feeOn-time71%
IberiaCheapest$599Average$794FlexibilityNo cancel feeOn-time77%
FinnairCheapest$626Average$852FlexibilityNo cancel feeOn-time76%
Brussels AirlinesCheapest$633Average$832FlexibilityNo cancel feeOn-timeN/A

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