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Cheap flights from the United Kingdom to Chicago from £245

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
17 May — 24 May1
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 17 April 2026.

Tue 2/613:50
MAN
-
ORD
2 stops34h 00m
Multiple Airlines
Thu 17/919:25
ORD
-
MAN
1 stop10h 15m
Multiple Airlines
Deal found 13/4£488
Mon 9/1107:25
MAN
-
ORD
2 stops15h 55m
Multiple Airlines
Wed 18/1118:30
ORD
-
MAN
1 stop10h 15m
Multiple Airlines
Deal found 14/4£495
Wed 16/915:40
LGW
-
ORD
1 stop11h 45m
Icelandair
Wed 14/1019:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 13/4£496
Tue 21/406:30
STN
-
ORD
2 stops17h 45m
Multiple Airlines
Tue 28/419:25
ORD
-
STN
2 stops16h 10m
Multiple Airlines
Deal found 12/4£499
Tue 21/409:40
LGW
-
ORD
2 stops14h 35m
Multiple Airlines
Tue 28/419:25
ORD
-
LGW
2 stops19h 50m
Multiple Airlines
Deal found 12/4£500
Thu 5/1110:25
LHR
-
ORD
Nonstop9h 20m
United Airlines
Sun 15/1115:45
ORD
-
LHR
Nonstop8h 10m
United Airlines
Deal found 15/4£501
Wed 1/708:40
LHR
-
ORD
1 stop16h 45m
JetBlue
Wed 29/710:56
ORD
-
LHR
1 stop13h 34m
JetBlue
Deal found 15/4£502
Thu 17/915:20
LHR
-
ORD
1 stop12h 46m
United Airlines
Sun 11/1018:35
ORD
-
LHR
Nonstop8h 25m
United Airlines
Deal found 16/4£504
Tue 21/409:40
LTN
-
ORD
2 stops14h 35m
Multiple Airlines
Tue 28/419:25
ORD
-
LTN
2 stops14h 05m
Multiple Airlines
Deal found 12/4£505
Mon 15/619:40
LTN
-
ORD
2 stops28h 35m
Multiple Airlines
Wed 24/622:25
ORD
-
LTN
2 stops18h 10m
Multiple Airlines
Deal found 15/4£507
Thu 30/414:10
LHR
-
ORD
Nonstop9h 10m
United Airlines
Tue 5/513:06
ORD
-
LHR
1 stop10h 49m
United Airlines
Deal found 16/4£508
Thu 24/906:55
MAN
-
ORD
2 stops16h 55m
Multiple Airlines
Wed 2/1218:30
ORD
-
MAN
1 stop10h 15m
Multiple Airlines
Deal found 14/4£508

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 17 April 2026.

Round-trip from

£488

One-way from

£245

Popular in

July

Cheapest in

September

Average price

£539

Good round-trip deal

£621 or less

Good one-way deal

£519 or less
Icelandair
  • Icelandair
  • 2/6-17/9
  • 3 total stops
  • 44h 15m total
  • United Kingdom to Chicago
Search Deals
27/5
  • 27/5
  • 2 total stops
  • 22h 03m total
  • United Kingdom to Chicago
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£51 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 17 April 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

Cheapest return flight

LondonChicago

LTN - ORD

LTNORD

London Luton

Wed 27/5

06:15-14:00

1 stop13h 45m

Chicago O'Hare Intl

Wed 3/6

15:45-15:25

1 stop17h 40m

£545

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 9/10

08:30-21:25

2 stops18h 55m

Chicago O'Hare Intl

Sun 11/10

09:50-18:25

2 stops26h 35m

£598

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 11/9

06:00-16:00

1 stop16h 00m

Chicago O'Hare Intl

Sun 20/9

18:00-17:45

1 stop17h 45m

£599

LondonChicago

LTN - ORD

LTNORD

London Luton

Wed 20/5

06:15-19:40

3 stops19h 25m

Chicago O'Hare Intl

Thu 4/6

12:59-23:25

3 stops28h 26m

£601

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Thu 28/5

14:00-11:09

2 stops27h 09m

Chicago Midway

Sun 31/5

15:20-10:45

1 stop13h 25m

£611

ManchesterChicago

MAN - ORD

MANORD

Manchester

Mon 24/8

19:10-17:41

2 stops52h 31m

Chicago O'Hare Intl

Mon 31/8

19:15-08:55

1 stop31h 40m

£616

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 14/9

09:30-18:04

2 stops14h 34m

Chicago O'Hare Intl

Thu 17/9

05:00-21:20

1 stop10h 20m

£619

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 13/5

06:30-16:29

2 stops15h 59m

Chicago O'Hare Intl

Mon 18/5

17:41-13:05

1 stop13h 24m

£622

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/9

06:30-16:36

2 stops16h 06m

Chicago O'Hare Intl

Wed 23/9

18:10-12:05

1 stop11h 55m

£622

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Tue 8/9

06:15-21:46

2 stops21h 31m

Chicago Midway

Mon 14/9

13:00-09:15

2 stops14h 15m

£631

Flights are sorted by cheapest return flights first.

Deals found on 12/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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, November is the cheapest month in which you can book a flight from United Kingdom to Chicago (average of £430). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £706). 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 17 April 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 17 April 2026.

The most flights from GB0 to CHI are scheduled on a Thursday (46 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 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 176 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?

Monday 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 17 April 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
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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
9,603 reviews
United Airlines
7.4
Good
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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
7.3
Good
1,512 reviews
United Airlines
7.4
Good
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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
634 reviews
United Airlines
7.4
Good
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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
7,926 reviews
United Airlines
7.4
Good
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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
7,889 reviews
United Airlines
7.4
Good
9,603 reviews
Check prices

Comfort

7.3

Entertainment

7.1

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

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 14h 34m. 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 £308 on JetBlue. Other airlines that offer cheap prices include United Airlines from £318 and Icelandair from £323 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 Gatwick - Chicago O'Hare Intl and London Stansted - 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 (87%), United Airlines (87%) or Brussels Airlines (87%) 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 £1,073, our data indicates the cheapest price to be £421. 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 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, November is the cheapest month in which you can book a flight from United Kingdom to Chicago (average of £430). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £706). 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
Gatwick to O'Hare Intl flights
Stansted to O'Hare Intl flights
Heathrow to Midway flights
London City to O'Hare Intl flights
Luton to O'Hare Intl flights
Heathrow to St. Louis flights
Manchester to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Gatwick to Midway flights
Manchester to Midway flights
Birmingham to O'Hare Intl flights
Gatwick to St. Louis flights
Stansted to St. Louis flights
Edinburgh to Midway flights
London City to St. Louis flights
Glasgow Intl to O'Hare Intl flights
Birmingham to Midway flights
Luton to St. Louis flights
Glasgow Intl to Midway flights
Southampton to O'Hare Intl flights
Newcastle upon Tyne to O'Hare Intl flights
Leeds to O'Hare Intl flights
Norwich to O'Hare Intl flights
Bristol to O'Hare Intl flights
Manchester to St. Louis flights
Belfast Intl to O'Hare Intl flights
Bristol to Midway flights
London City to Midway flights
Belfast City to O'Hare Intl flights
Newcastle upon Tyne to Midway flights
Edinburgh to St. Louis flights
Southend to O'Hare Intl flights
Liverpool to O'Hare Intl flights
Madrid to O'Hare Intl flights
Grimsby to O'Hare Intl flights
Dublin to O'Hare Intl flights
Dublin to Midway flights
Frederic Chopin to O'Hare Intl flights
Cardiff to O'Hare Intl flights
Leeds to Midway flights
Athens to O'Hare Intl flights
Inverness to O'Hare Intl flights
Bruxelles-National to O'Hare Intl flights
Glasgow Intl to St. Louis flights
Southampton to Midway flights
Darlington 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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£37Average£48FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
IcelandairCheapest£284Average£535FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£342Average£597FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Aer LingusCheapest£361Average£693FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£366Average£470FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£382Average£506FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£391Average£560FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£391Average£581FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£393Average£672FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£401Average£630FlexibilityNo cancel feeOn-time78%
Search Austrian 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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