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Cheap flights from the United Kingdom to Chicago from £256

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
29 Mar — 5 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Chicago

Enter your travel dates to find the best prices.

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 27 February 2026.

Mon 13/415:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Mon 27/419:25
ORD
-
LGW
1 stop10h 20m
Icelandair
Deal found 24/2£400
Wed 15/408:00
LHR
-
ORD
1 stop14h 00m
TAP AIR PORTUGAL
Sat 25/418:05
ORD
-
LHR
1 stop12h 40m
TAP AIR PORTUGAL
Deal found 23/2£400
Thu 12/316:30
LHR
-
ORD
1 stop28h 55m
TAP AIR PORTUGAL
Sun 22/321:25
ORD
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Deal found 24/2£401
Tue 14/415:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Mon 20/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 24/2£402
Mon 13/408:30
STN
-
ORD
2 stops16h 55m
Multiple Airlines
Mon 27/419:25
ORD
-
STN
3 stops20h 10m
Multiple Airlines
Deal found 26/2£404
Sun 10/515:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Sun 17/522:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 23/2£405
Fri 17/419:50
LHR
-
ORD
1 stop26h 15m
TAP AIR PORTUGAL
Sat 25/418:05
ORD
-
LHR
1 stop34h 15m
TAP AIR PORTUGAL
Deal found 24/2£405
Thu 14/513:00
LGW
-
ORD
1 stop11h 15m
Icelandair
Tue 19/522:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 25/2£406
Thu 12/310:20
LHR
-
ORD
1 stop12h 25m
Scandinavian Airlines
Mon 16/320:20
ORD
-
LHR
1 stop14h 40m
Scandinavian Airlines
Deal found 25/2£406
Sat 18/416:30
LGW
-
ORD
1 stop29h 30m
TAP AIR PORTUGAL
Sat 25/418:05
ORD
-
LGW
1 stop33h 40m
TAP AIR PORTUGAL
Deal found 25/2£407
Fri 17/418:45
LHR
-
ORD
1 stop27h 20m
TAP AIR PORTUGAL
Sun 26/418:00
ORD
-
LHR
1 stop22h 00m
TAP AIR PORTUGAL
Deal found 25/2£407
Fri 17/415:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Fri 24/419:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 26/2£407

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 27 February 2026.

Round-trip from

£398

One-way from

£256

Popular in

July

Cheapest in

September

Average price

£435

Good round-trip deal

£514 or less

Good one-way deal

£419 or less
Icelandair
  • Icelandair
  • 16/4-20/4
  • 2 total stops
  • 45h 50m total
  • United Kingdom to Chicago
Search Deals
9/4
  • 9/4
  • 3 total stops
  • 24h 22m total
  • United Kingdom to Chicago
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£58 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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

 
Customise 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 858,174 searches. Data last updated 27 February 2026.
Use the filters below to find and compare flights from the United Kingdom to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 13/4

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Mon 27/4

15:45-09:15

1 stop11h 30m

£493

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 13/4

07:25-14:00

1 stop12h 35m

Chicago O'Hare Intl

Thu 23/4

16:25-06:45

Nonstop8h 20m

£503

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 13/4

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Mon 20/4

15:45-09:15

1 stop11h 30m

£507

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 15/4

12:20-21:38

1 stop15h 18m

Chicago O'Hare Intl

Mon 27/4

16:55-10:50

1 stop11h 55m

£523

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 15/4

09:20-15:55

1 stop12h 35m

Chicago O'Hare Intl

Mon 27/4

21:30-17:50

2 stops14h 20m

£531

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 12/3

21:05-17:55

2 stops25h 50m

Chicago O'Hare Intl

Fri 20/3

20:20-18:30

2 stops17h 10m

£539

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 13/4

11:30-22:28

2 stops16h 58m

Chicago Midway

Mon 27/4

12:52-07:15

1 stop12h 23m

£539

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/6

15:35-16:10

2 stops30h 35m

Chicago O'Hare Intl

Wed 10/6

07:00-09:20

2 stops20h 20m

£543

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 13/4

10:45-17:58

1 stop13h 13m

Chicago Midway

Thu 23/4

13:24-07:10

1 stop11h 46m

£548

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Mon 13/4

10:45-17:58

1 stop13h 13m

Chicago Midway

Mon 20/4

13:24-07:10

1 stop11h 46m

£549

Flights are sorted by cheapest return flights first.

Deals found on 25/2

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

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 return 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 £67). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £461). 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 27 February 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 27 February 2026.

The most flights from GB0 to CHI are scheduled on a Wednesday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 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?

Thursday 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 past 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 27 February 2026.
Read reviews from past customers who have flown with United Airlines, Aer Lingus, andIcelandair from the United Kingdom to Chicago. 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.
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
9,358 reviews
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
1,464 reviews
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
617 reviews
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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.
Lufthansa
6.8
Okay
7,816 reviews
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
7,772 reviews
United Airlines
7.4
Good
9,358 reviews
Check prices

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

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?

    Departing from United Kingdom to Chicago will take you 12h 35m. The distance from United Kingdom to Chicago is about 3939 mi. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as £290 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include JetBlue from £308 and Scandinavian Airlines from £315 one-way.

  • 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?

    No one likes to see their flight delayed. When booking a flight from United Kingdom to Chicago consider choosing Air Canada (91%), United Airlines (91%) or Brussels Airlines (91%) as they are the most reliable in getting you off to your destination on time.

  • 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 £1,331, our data indicates the cheapest price to be £363. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £393.

  • 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 holiday 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 £67). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £461). 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 Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to O'Hare Intl flights
Heathrow to Midway flights
Gatwick to O'Hare Intl flights
Stansted to O'Hare Intl flights
London City to O'Hare Intl flights
Luton to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Heathrow to St. Louis flights
Manchester to O'Hare Intl flights
Gatwick to St. Louis flights
Edinburgh to Midway flights
London City to St. Louis flights
Stansted to St. Louis flights
Gatwick to Midway flights
Manchester to Midway flights
Birmingham to O'Hare Intl flights
Glasgow Intl to O'Hare Intl flights
Leeds to O'Hare Intl flights
Glasgow Intl to Midway flights
Norwich to O'Hare Intl flights
Luton to St. Louis flights
Birmingham to Midway flights
Newcastle upon Tyne to O'Hare Intl flights
Cardiff to O'Hare Intl flights
Bristol to O'Hare Intl flights
Southend to O'Hare Intl flights
Manchester to St. Louis flights
Southampton to O'Hare Intl flights
Belfast Intl to O'Hare Intl flights
Bristol to Midway flights
Cardiff to Midway flights
Newcastle upon Tyne to Midway flights
Inverness to O'Hare Intl flights
Belfast City to O'Hare Intl flights
Heathrow to Champaign flights
Grimsby to O'Hare Intl flights
Edinburgh to St. Louis flights
Exeter to O'Hare Intl flights
Leeds to Midway flights
Heathrow to Moline flights
Heathrow to Peoria flights
Darlington to Midway flights
Heathrow to Springfield flights
Birmingham to St. Louis flights
Liverpool to O'Hare Intl flights
Darlington to O'Hare Intl flights
Dublin to O'Hare Intl flights
Manchester to Moline flights
Newquay 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 858,174 searches. Data last updated 27 February 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£284Average£554FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£285Average£669FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£342Average£579FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£362Average£693FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£366Average£464FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£383Average£606FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£383Average£538FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£390Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£399Average£608FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£408Average£617FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Chicago?

When you search for this flight from United Kingdom to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Chicago?

Cheapflights simply makes it quick and affordable to book flights from United Kingdom to Chicago by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from United Kingdom to Chicago with no change fees?

Need flexible booking options for your flight to Chicago from United Kingdom? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Chicago become cheaper?

Yes, Cheapflights offers price alerts on United Kingdom to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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