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$270+ Cheap flights from the United Kingdom to Chicago (CHI)

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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from United Kingdom to Chicago

Cheapest flights from United Kingdom to Chicago
Explore the most affordable flight options available from United Kingdom to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Mytrip deal was found by Cheapflights users on 1/28. 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.
Wed 2/1111:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Sat 2/146:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/28$528
This Icelandair deal was found by Cheapflights users on 1/26. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1912:15 pm
LHR
-
ORD
1 stop11h 05m
Icelandair
Mon 2/236:30 pm
ORD
-
LHR
1 stop10h 20m
Icelandair
Deal found 1/26$528
This Mytrip deal was found by Cheapflights users on 1/28. 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.
Wed 2/2511:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Wed 3/46:30 pm
ORD
-
LGW
1 stop10h 25m
Icelandair
Deal found 1/28$529
This oojo deal was found by Cheapflights users on 1/27. 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.
Wed 2/187:30 pm
LHR
-
ORD
1 stop27h 15m
Scandinavian Airlines
Mon 3/27:20 pm
ORD
-
LHR
2 stops17h 30m
Scandinavian Airlines
Deal found 1/27$529
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:05 pm
LGW
-
ORD
1 stop29h 55m
Multiple Airlines
Wed 5/66:31 am
ORD
-
LGW
1 stop17h 49m
Multiple Airlines
Deal found 1/28$530
This Icelandair deal was found by Cheapflights users on 1/27. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/88:35 pm
LHR
-
ORD
1 stop26h 45m
Icelandair
Tue 4/287:25 pm
ORD
-
LHR
1 stop18h 55m
Icelandair
Deal found 1/27$530
This Justfly.com deal was found by Cheapflights users on 1/27. 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 2/54:00 pm
LGW
-
ORD
1 stop29h 25m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
-
LGW
1 stop13h 55m
TAP AIR PORTUGAL
Deal found 1/27$531
This Mytrip deal was found by Cheapflights users on 1/27. 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 2/54:30 pm
LHR
-
ORD
1 stop28h 55m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
-
LHR
1 stop21h 30m
TAP AIR PORTUGAL
Deal found 1/27$531
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/74:35 pm
LGW
-
ORD
1 stop28h 10m
TAP AIR PORTUGAL
Wed 2/187:10 pm
ORD
-
LGW
1 stop13h 55m
TAP AIR PORTUGAL
Deal found 1/28$532
This Cheapflightsfares deal was found by Cheapflights users on 1/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2610:20 am
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Mon 3/27:20 pm
ORD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Deal found 1/28$532
This Icelandair deal was found by Cheapflights users on 1/27. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:55 am
LGW
-
ORD
1 stop11h 25m
Icelandair
Sat 5/27:25 pm
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 1/27$533
This TravelUp deal was found by Cheapflights users on 1/29. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:35 pm
LHR
-
ORD
1 stop26h 45m
Icelandair
Tue 3/177:30 pm
ORD
-
LHR
1 stop10h 20m
Icelandair
Deal found 1/29$534

Find flight deals from United Kingdom to Chicago

Keep the following information in mind while searching for United Kingdom to Chicago flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$528
(Mytrip)

One-way from

$270
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$624

Good round-trip deal

$659 or less

Good one-way deal

$616 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 Chicago (CHI)
Search Deals
One-way flight from United Kingdom to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($119 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 January 2026
Search Deals
Price to beat on a round-trip flight from United Kingdom to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from United Kingdom to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom to Chicago 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 January 29, 2026.
Use the filters below to find and compare flights from the United Kingdom to Chicago that are best for you.

Fly from

United Kingdom

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 3/13

11:55 am-6:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Fri 5/1

7:25 pm-2:40 pm

1 stop13h 15m

$533

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 3/11

11:55 am-6:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Fri 5/1

10:25 pm-2:40 pm

1 stop10h 15m

$533

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 2/19

2:00 pm-7:47 pm

1 stop35h 47m

Chicago O'Hare Intl

Fri 3/6

12:44 pm-10:00 am

1 stop15h 16m

$544

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/11

9:00 am-5:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Wed 3/18

1:06 pm-10:50 am

1 stop16h 44m

$548

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 3/4

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 3/10

7:30 pm-10:55 am

1 stop10h 25m

$549

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Mon 3/2

2:00 pm-7:07 pm

2 stops35h 07m

Chicago Midway

Sun 3/8

7:30 am-6:00 am

1 stop17h 30m

$551

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 2/21

11:55 am-5:20 pm

1 stop11h 25m

Chicago O'Hare Intl

Wed 4/22

7:25 pm-2:40 pm

1 stop13h 15m

$551

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 4/18

3:40 pm-6:15 pm

1 stop32h 35m

Chicago O'Hare Intl

Mon 5/11

7:25 pm-11:45 am

1 stop10h 20m

$551

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 3/9

7:40 am-3:10 pm

1 stop12h 30m

Chicago O'Hare Intl

Tue 4/28

6:40 pm-9:00 am

Nonstop8h 20m

$552

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 3/7

7:30 am-6:28 pm

2 stops16h 58m

Chicago O'Hare Intl

Fri 3/13

9:15 pm-10:50 am

1 stop32h 35m

$560

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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

Have a flexible travel schedule? Discover the best time to fly to Chicago 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 Chicago

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Chicago (average of $91). Flying from United Kingdom to Chicago in July is currently the most expensive (average of $624). 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 CHI?

Find hourly flight availability from United Kingdom to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from United Kingdom to Chicago as you normally would.

Weekly flight availability from United Kingdom to Chicago

Explore weekly flight availability from United Kingdom to Chicago. 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 January 29, 2026.

The most flights from GB0 to CHI are scheduled on a Wednesday (42 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (33 on average).

How often are flights from the United Kingdom to Chicago delayed?

About 11% of weekly flights between United Kingdom and Chicago have experienced delays in the past year, with the average delay time being 170 minutes.

What is the most punctual flight time for the United Kingdom to Chicago flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on the United Kingdom to Chicago flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated January 29, 2026.
See what other customers who have flown with United Airlines, American Airlines, and Aer Lingus from the United Kingdom to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
11,199 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
1,442 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
606 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
7,705 reviews
United Airlines
7.4
Good
9,215 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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 Chicago. 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 Chicago?

    Icelandair, United Airlines, and Lufthansa can get you from United Kingdom to Chicago in just under 11h 25m. Your travel time can differ by up to 1h 55m. United Kingdom and Chicago are separated by 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 Chicago one-way?

    The cheapest airlines for a one-way flight from United Kingdom to Chicago are Scandinavian Airlines ($288), TAP AIR PORTUGAL ($381), and Aer Lingus ($455).

  • What are the most popular routes from United Kingdom to Chicago?

    The most popular flight routes from United Kingdom to Chicago are London Heathrow - Chicago O'Hare Intl, London Heathrow - Chicago Midway and London Gatwick - Chicago O'Hare Intl.

  • What are the most reliable airlines from United Kingdom to Chicago?

    Consider SWISS (88%), Austrian Airlines (87%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from United Kingdom to Chicago.

  • What are the cheapest flights from United Kingdom to Chicago?

    Looking for the cheapest flight from United Kingdom to Chicago? While on average our users pay $1,474, our data indicates the cheapest price to be $502. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around $432.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from United Kingdom to Chicago (average of $91). Flying from United Kingdom to Chicago in July is currently the most expensive (average of $624). 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

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lansing
Merrillville
Hammond
Porter
Benton Harbor

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Alternative routes for United Kingdom to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to O'Hare Intl flights
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Bergamo to O'Hare Intl flights
Munich to O'Hare Intl flights
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Madrid to Midway flights
Sofia to O'Hare Intl flights
Bordeaux to O'Hare Intl flights
Katowice to O'Hare Intl flights
Bruxelles-National to Midway flights
Gdansk to O'Hare Intl flights
Beauvais-Tille to O'Hare Intl flights
Belgrade to O'Hare Intl flights
Duesseldorf Intl to Midway flights
Berlin to O'Hare Intl flights
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Hamburg to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Copenhagen to O'Hare Intl flights

Top 10 airlines flying from United Kingdom to Chicago

Discover the top 10 airlines that operate flights from United Kingdom to Chicago. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$446Average$821FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$453Average$544FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$468Average$581FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$485Average$775FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$530Average$897FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$531Average$762FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$558Average$789FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$558Average$778FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$572Average$776FlexibilityNo cancel feeOn-time71%
FinnairCheapest$576Average$750FlexibilityNo cancel feeOn-time76%

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