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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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ORD
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap 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 diciembre 15, 2025.

This oojo deal was found by Cheapflights users on 12/15. 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.
mar. 12/238:35 pmLHR - ORD
1 stop26h 45mIcelandair
jue. 1/156:30 pmORD - LHR
1 stop19h 00mIcelandair
Deal found 12/15$640
This Trip.com deal was found by Cheapflights users on 12/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
jue. 1/87:20 pmORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 12/13$649
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/247:50 pmLHR - ORD
2 stops26h 55mScandinavian Airlines
dom. 1/117:10 pmORD - LHR
1 stop17h 20mScandinavian Airlines
Deal found 12/14$668
This Scandinavian Airlines deal was found by Cheapflights users on 12/14. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:40 amLHR - ORD
1 stop16h 05mScandinavian Airlines
mar. 1/1311:00 amORD - LHR
2 stops23h 00mScandinavian Airlines
Deal found 12/14$690
This FlightHub deal was found by Cheapflights users on 12/15. 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.
mar. 12/238:35 pmLHR - ORD
1 stop26h 45mIcelandair
mar. 1/66:30 pmORD - LHR
1 stop19h 00mIcelandair
Deal found 12/15$702
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
jue. 12/2510:00 amLGW - ORD
2 stops35h 25mMultiple Airlines
vie. 2/612:44 pmORD - LGW
1 stop15h 16mMultiple Airlines
Deal found 12/15$708
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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.
vie. 12/2610:20 amLHR - ORD
1 stop12h 25mScandinavian Airlines
jue. 1/227:20 pmORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 12/15$716
This deal was found by Cheapflights users on 12/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/2611:55 amLGW - ORD
1 stop11h 25mIcelandair
mar. 1/66:30 pmORD - LGW
1 stop10h 25mIcelandair
Deal found 12/14$728
This Mytrip deal was found by Cheapflights users on 12/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:05 amSTN - ORD
1 stop13h 55mMultiple Airlines
sáb. 12/273:50 pmORD - STN
1 stop10h 00mMultiple Airlines
Deal found 12/13$743
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/2510:00 amLGW - ORD
2 stops35h 25mMultiple Airlines
sáb. 1/1712:44 pmORD - LGW
1 stop15h 21mMultiple Airlines
Deal found 12/13$751
This Mytrip deal was found by Cheapflights users on 12/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/248:15 amMAN - ORD
1 stop11h 45mMultiple Airlines
sáb. 12/277:40 pmORD - MAN
1 stop19h 40mMultiple Airlines
Deal found 12/13$769
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:30 amSTN - ORD
1 stop13h 30mMultiple Airlines
mié. 12/313:50 pmORD - STN
1 stop10h 00mMultiple Airlines
Deal found 12/14$773

Find 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 diciembre 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$538
(Gotogate)

One-way from

$392
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$799

Good round-trip deal

$731 or less

Good one-way deal

$633 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 ($108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 diciembre 15, 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

ManchesterChicago

MAN - ORD

MANORD

Manchester

sáb. 1/31

10:10 am-4:45 pm

1 stop12h 35m

Chicago O'Hare Intl

mié. 2/4

7:20 pm-6:35 pm

1 stop17h 15m

$552

ManchesterChicago

MAN - ORD

MANORD

Manchester

vie. 3/13

10:10 am-5:55 pm

1 stop12h 45m

Chicago O'Hare Intl

mié. 4/1

7:35 pm-8:55 am

1 stop31h 20m

$573

ManchesterChicago

MAN - ORD

MANORD

Manchester

mar. 3/10

7:15 pm-5:45 pm

1 stop27h 30m

Chicago O'Hare Intl

mié. 4/1

7:35 pm-8:55 am

1 stop31h 20m

$573

ManchesterChicago

MAN - ORD

MANORD

Manchester

jue. 3/19

10:10 am-5:45 pm

1 stop12h 35m

Chicago O'Hare Intl

mié. 4/15

7:15 pm-6:30 pm

1 stop17h 15m

$573

ManchesterChicago

MAN - ORD

MANORD

Manchester

mié. 3/11

7:15 pm-5:45 pm

1 stop27h 30m

Chicago O'Hare Intl

vie. 4/3

7:15 pm-11:45 am

2 stops34h 30m

$576

LondonChicago

LTN - ORD

LTNORD

London Luton

jue. 1/29

9:00 am-5:20 pm

2 stops14h 20m

Chicago O'Hare Intl

jue. 2/5

6:30 pm-1:20 pm

2 stops12h 50m

$600

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

dom. 1/11

2:10 pm-10:59 pm

1 stop14h 49m

Chicago Midway

dom. 1/18

6:30 pm-8:35 pm

2 stops20h 05m

$640

EdinburghChicago

EDI - ORD

EDIORD

Edinburgh Turnhouse

mié. 1/28

11:00 am-4:55 pm

3 stops35h 55m

Chicago O'Hare Intl

mié. 2/4

7:20 pm-10:15 pm

2 stops20h 55m

$646

LondonChicago

LGW - ORD

LGWORD

London Gatwick

lun. 4/13

3:40 pm-6:15 pm

1 stop32h 35m

Chicago O'Hare Intl

dom. 4/19

7:25 pm-2:40 pm

1 stop13h 15m

$648

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

lun. 1/12

2:00 pm-11:09 pm

1 stop15h 09m

Chicago Midway

lun. 1/19

10:07 am-10:00 am

1 stop17h 53m

$650

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of $51). 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 diciembre 15, 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.

Weekly flight availability from United Kingdom to Illinois

Explore weekly flight availability from United Kingdom 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 diciembre 15, 2025.

The most flights from GB0 to USIL are scheduled on a Sunday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (31 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 diciembre 15, 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
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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
11,051 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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
1,394 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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
7.0
Good
590 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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
7,575 reviews
United Airlines
7.4
Good
9,092 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Boarding

7.7

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 12h 35m. Airlines will cover a distance of 3812 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?

    $234 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on TAP AIR PORTUGAL and American Airlines, with prices starting from $381 and $442, 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, January is the cheapest month in which you can book a flight from United Kingdom to Illinois (average of $51). 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$811FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$451Average$613FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$468Average$592FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$485Average$767FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$531Average$757FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$793FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$798FlexibilityNo cancel feeOn-time71%
FinnairCheapest$625Average$808FlexibilityNo cancel feeOn-time76%

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