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Cheap flights from the United Kingdom to Chicago from £273

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CHI
26 Feb — 5 Mar1
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 21 February 2025.

Round-trip from

£417

One-way from

£273

Popular in

August

Cheapest in

February

Average price

£459

Good round-trip deal

£552 or less

Good one-way deal

£570 or less
Austrian Airlines
  • Austrian Airlines
  • 23/4-29/4
  • 1 total stop
  • 20h 25m total
  • United Kingdom to Chicago
Search Deals
17/3
  • 17/3
  • 3 total stops
  • 46h 34m total
  • United Kingdom to Chicago
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£61 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2025
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).
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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 21 February 2025.

Wed 23/406:00LHR - ORD
1 stop12h 10mMultiple Airlines
Tue 29/416:05ORD - LHR
Nonstop8h 15mMultiple Airlines
Deal found 20/2£417
Fri 7/307:40LHR - ORD
1 stop12h 30mUnited Airlines
Wed 12/312:48ORD - LHR
1 stop12h 07mUnited Airlines
Deal found 20/2£418
Tue 25/220:40LHR - ORD
1 stop26h 40mIcelandair
Mon 3/318:30ORD - LHR
1 stop19h 00mIcelandair
Deal found 20/2£421
Thu 6/314:00LGW - ORD
1 stop15h 28mMultiple Airlines
Tue 25/321:01ORD - LGW
2 stops30h 04mMultiple Airlines
Deal found 20/2£421
Fri 21/206:00LHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Fri 28/220:20ORD - LHR
1 stop16h 35mTAP AIR PORTUGAL
Deal found 20/2£423
Thu 6/306:00LHR - ORD
1 stop12h 55mSWISS
Tue 18/320:05ORD - LHR
1 stop11h 55mSWISS
Deal found 20/2£425
Sat 1/314:10LHR - ORD
Nonstop8h 50mBritish Airways
Tue 18/321:15ORD - LHR
Nonstop7h 45mBritish Airways
Deal found 20/2£425
Thu 20/306:30LHR - MDW
2 stops16h 32mKLM
Thu 27/314:55MDW - LHR
1 stop10h 55mKLM
Deal found 20/2£429
Thu 27/214:30LHR - ORD
1 stop13h 36mLufthansa
Wed 2/421:20ORD - LHR
Nonstop8h 25mLufthansa
Deal found 20/2£430
Wed 26/211:55LHR - ORD
Nonstop8h 50mFinnair
Wed 5/316:16ORD - LHR
1 stop10h 19mFinnair
Deal found 19/2£431
Thu 27/215:55LGW - ORD
1 stop29h 35mTAP AIR PORTUGAL
Wed 2/418:00ORD - LGW
1 stop14h 00mTAP AIR PORTUGAL
Deal found 20/2£432
Thu 6/318:40LGW - ORD
1 stop27h 35mSWISS
Mon 10/317:55ORD - LGW
2 stops18h 55mSWISS
Deal found 20/2£435

Find flights from United Kingdom to Chicago within your budget

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 21 February 2025.

Fly from

United Kingdom

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

06:00-12:10

1 stop12h 10m

Chicago O'Hare Intl

Tue 29/4

16:05-06:20

Nonstop8h 15m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 7/3

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Wed 12/3

12:48-05:55

1 stop12h 07m

£418

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 6/3

14:00-23:28

1 stop15h 28m

Chicago O'Hare Intl

Tue 25/3

21:01-08:05

2 stops30h 04m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 8/3

07:40-14:10

1 stop12h 30m

Chicago O'Hare Intl

Wed 12/3

16:15-08:45

1 stop11h 30m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 6/3

06:00-12:55

1 stop12h 55m

Chicago O'Hare Intl

Tue 18/3

20:05-13:00

1 stop11h 55m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 12/3

10:25-14:50

Nonstop9h 25m

Chicago O'Hare Intl

Wed 26/3

18:50-07:55

Nonstop8h 05m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 5/3

11:55-14:45

Nonstop8h 50m

Chicago O'Hare Intl

Sun 9/3

21:15-10:00

Nonstop7h 45m

£427

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Thu 20/3

06:30-18:02

2 stops16h 32m

Chicago Midway

Thu 27/3

14:55-06:50

1 stop10h 55m

£429

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 23/4

11:05-13:50

Nonstop8h 45m

Chicago O'Hare Intl

Tue 29/4

16:55-06:50

Nonstop7h 55m

£429

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

13:05-21:15

1 stop14h 10m

Chicago O'Hare Intl

Wed 8/10

19:25-11:55

1 stop10h 30m

£430

Flights are sorted by cheapest return flights first.

Deals found on 20/2

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 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.

Travel insights for flights from United Kingdom to Chicago

Get recent, data-driven insights about flights from United Kingdom to Chicago including ideal travel times, pricing trends, and more.

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 21 February 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 21 February 2025.

The most flights from GB0 to CHI are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago when rainfall is around 43.0 mm.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 21 February 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat from United Kingdom to Chicago. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,213 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,331 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat
7.8
Good
380 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT
7.6
Good
1,080 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Crew

8.5

Comfort

8.0

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 £356 on WestJet. Other airlines that offer cheap prices include Air Transat from £391 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 (91%), Austrian Airlines (91%) or United 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 £1,146, our data indicates the cheapest price to be £438. The most popular route (London Heathrow - Chicago O'Hare Intl), is priced around £350.

  • 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
Manchester to O'Hare Intl flights
Manchester to Midway flights
Luton to O'Hare Intl flights
Stansted to O'Hare Intl flights
Gatwick to Midway flights
Birmingham to O'Hare Intl flights
Heathrow to St. Louis flights
Edinburgh to O'Hare Intl flights
Amsterdam to O'Hare Intl flights
London City to Midway flights
Birmingham to Midway flights
Gatwick to St. Louis flights
Glasgow Intl to O'Hare Intl flights
Edinburgh to Midway flights
London City to St. Louis flights
Belfast Intl to O'Hare Intl flights
Manchester to St. Louis flights
Liverpool to O'Hare Intl flights
Bristol to O'Hare Intl flights
Bristol to Midway flights
Istanbul to O'Hare Intl flights
Glasgow Intl to Midway flights
Dublin to O'Hare Intl flights
Edinburgh to St. Louis flights
Newcastle upon Tyne to O'Hare Intl flights
Belfast City to O'Hare Intl flights
Stansted to St. Louis flights
Heathrow to Evansville flights
Birmingham to St. Louis flights
Inverness to O'Hare Intl flights
Newcastle upon Tyne to St. Louis flights
Luton to St. Louis flights
Leeds to St. Louis flights
Glasgow Intl to St. Louis flights
Frederic Chopin to O'Hare Intl flights
Heathrow to Moline flights
Southampton to O'Hare Intl flights
Leeds to O'Hare Intl flights
Heathrow to Champaign flights
Norwich to O'Hare Intl flights
Edinburgh to Moline flights
Newcastle upon Tyne to Midway flights
Southampton to Midway 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£332Average£545FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£348Average£624FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air FranceCheapest£358Average£495FlexibilityNo cancel feeOn-time77%
Search Air France flights
Scandinavian AirlinesCheapest£376Average£513FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£388Average£585FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£403Average£638FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£417Average£635FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Austrian AirlinesCheapest£434Average£599FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
LufthansaCheapest£437Average£674FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£440Average£657FlexibilityNo 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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