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Cheap flights from the United Kingdom to Chicago from £240

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 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
15 Jul — 22 Jul1
1 adult

Cheap 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 10 July 2025.

Round-trip from

£408

One-way from

£240

Popular in

August

Cheapest in

February

Average price

£648

Good round-trip deal

£541 or less

Good one-way deal

£598 or less
Lufthansa
  • Lufthansa
  • 4/9-12/10
  • 1 total stop
  • 31h 10m total
  • United Kingdom to Chicago
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29/9
  • 29/9
  • 2 total stops
  • 41h 38m total
  • United Kingdom to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£53 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 July 2025
Search Deals
Price to beat on a round-trip flight from United Kingdom to Chicago (CHI).
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Price to beat on a one-way flight from United Kingdom to Chicago (CHI).
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Find 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 10 July 2025.

Thu 4/920:05LHR - ORD
1 stop22h 50mMultiple Airlines
Sun 12/1016:00ORD - LHR
Nonstop8h 20mMultiple Airlines
Deal found 8/7£408
Wed 24/909:50LHR - ORD
1 stop11h 55mBritish Airways
Wed 1/1017:40ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 8/7£408
Thu 21/810:35LGW - ORD
1 stop35h 35mTAP AIR PORTUGAL
Sat 13/918:15ORD - LGW
1 stop33h 30mTAP AIR PORTUGAL
Deal found 7/7£409
Tue 2/1217:30LHR - ORD
2 stops29h 15mScandinavian Airlines
Sat 17/119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 8/7£409
Mon 1/915:40LGW - ORD
1 stop11h 35mIcelandair
Mon 3/1118:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 9/7£410
Wed 3/1213:30LHR - ORD
1 stop12h 35mLufthansa
Mon 8/1215:45ORD - LHR
Nonstop8h 10mLufthansa
Deal found 8/7£411
Wed 27/813:45LHR - ORD
1 stop29h 05mTAP AIR PORTUGAL
Sun 31/818:00ORD - LHR
1 stop18h 50mTAP AIR PORTUGAL
Deal found 8/7£414
Thu 16/1007:35STN - ORD
2 stops16h 40mMultiple Airlines
Thu 23/1019:25ORD - STN
2 stops16h 00mMultiple Airlines
Deal found 7/7£414
Thu 28/814:00LGW - ORD
1 stop14h 22mMultiple Airlines
Sat 6/919:25ORD - LGW
2 stops14h 20mMultiple Airlines
Deal found 8/7£415
Wed 17/913:05LHR - ORD
1 stop11h 10mIcelandair
Tue 30/919:25ORD - LHR
1 stop10h 30mIcelandair
Deal found 9/7£415
Sun 7/919:30LHR - ORD
1 stop23h 50mAustrian Airlines
Sat 20/912:50ORD - LHR
1 stop12h 05mAustrian Airlines
Deal found 8/7£421
Fri 5/913:30LTN - ORD
2 stops32h 40mMultiple Airlines
Sun 21/919:15ORD - LTN
2 stops20h 15mMultiple Airlines
Deal found 8/7£425

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 10 July 2025.
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

LHR - ORD

LHRORD

London Heathrow

Thu 4/9

20:05-12:55

1 stop22h 50m

Chicago O'Hare Intl

Sun 12/10

16:00-06:20

Nonstop8h 20m

£408

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 23/10

10:35-16:10

1 stop35h 35m

Chicago O'Hare Intl

Fri 31/10

21:15-09:50

1 stop31h 35m

£408

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 24/9

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Wed 1/10

17:40-07:20

Nonstop7h 40m

£408

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 2/12

17:30-16:45

2 stops29h 15m

Chicago O'Hare Intl

Sat 17/1

19:20-16:00

1 stop14h 40m

£409

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 1/9

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Mon 3/11

18:30-10:55

1 stop10h 25m

£410

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 24/8

18:45-16:40

1 stop27h 55m

Chicago O'Hare Intl

Sun 31/8

18:00-22:55

1 stop22h 55m

£410

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 20/9

09:50-04:46

2 stops24h 56m

Chicago O'Hare Intl

Mon 29/9

10:27-06:55

1 stop14h 28m

£411

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/12

13:30-20:05

1 stop12h 35m

Chicago O'Hare Intl

Mon 8/12

15:45-05:55

Nonstop8h 10m

£411

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 17/9

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Tue 30/9

19:25-11:55

1 stop10h 30m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/9

09:05-13:20

1 stop34h 15m

Chicago O'Hare Intl

Thu 18/9

21:25-11:45

Nonstop8h 20m

£420

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 59 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 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 £595). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £843). 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 10 July 2025.

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 10 July 2025.

The most flights from GB0 to CHI are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

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 10 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAustrian Airlines 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.
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,952 reviews
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,370 reviews
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
806 reviews
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,468 reviews
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,652 reviews
Delta
8.0
Very Good
7,952 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • 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 £392 on JetBlue. Other airlines that offer cheap prices include Aer Lingus from £394 and Icelandair from £399 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 City - 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 (89%), Austrian Airlines (89%) or United Airlines (89%) 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 £1,826, our data indicates the cheapest price to be £402. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £353.

  • 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 £595). Flying from United Kingdom to Chicago in July is currently the most expensive (average of £843). 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
Heathrow to Midway flights
London City to O'Hare Intl flights
Luton to O'Hare Intl flights
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Manchester to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Manchester to Midway flights
Gatwick to Midway flights
Heathrow to St. Louis flights
Frederic Chopin to O'Hare Intl flights
Edinburgh to Midway flights
Newcastle upon Tyne to O'Hare Intl flights
Gatwick to St. Louis flights
London City to Midway flights
London City to St. Louis flights
Leeds to O'Hare Intl flights
Dublin to O'Hare Intl flights
Birmingham to O'Hare Intl flights
Glasgow Intl to O'Hare Intl flights
Istanbul to O'Hare Intl flights
Newcastle upon Tyne to Midway flights
Manchester to St. Louis flights
Edinburgh to St. Louis flights
Leeds to Midway flights
Birmingham to Midway flights
Glasgow Intl to Midway flights
Glasgow Intl to St. Louis flights
Stansted to St. Louis flights
Dublin to Midway flights
Luton to St. Louis flights
Heathrow to Evansville flights
Amsterdam to O'Hare Intl flights
Inverness to O'Hare Intl flights
Birmingham to St. Louis flights
Bristol to O'Hare Intl flights
Bristol to Midway flights
Southampton to O'Hare Intl flights
Newquay to O'Hare Intl flights
Exeter to O'Hare Intl flights
Heathrow to Moline flights
Cardiff to Midway flights
Cardiff to O'Hare Intl flights
Madrid to O'Hare Intl flights
Bruxelles-National to O'Hare Intl flights
Vienna 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 10 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£310Average£549FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£323Average£632FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air FranceCheapest£333Average£604FlexibilityNo cancel feeOn-time77%
Search Air France flights
Scandinavian AirlinesCheapest£349Average£478FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£363Average£609FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£374Average£544FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£381Average£602FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£389Average£600FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£394Average£614FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£397Average£575FlexibilityNo 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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