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Cheap flights from London to Chicago from £388

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 14/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
9 Jul — 16 Jul1
1 adult

Cheapflights Tip: The best prices from London to Chicago are usually found in February or March, booked 44 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from London to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.

Round-trip from

£407

One-way from

£388

Popular in

August

Cheapest in

February

Average price

£645

Good round-trip deal

£514 or less

Good one-way deal

£551 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 20/8-25/8
  • 2 total stops
  • 45h 40m total
  • London to Chicago
14/8
  • 14/8
  • 1 total stop
  • 31h 06m total
  • London to Chicago
Highest demand for flights based on searches. 12% potential increase in price (£53 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from London (LON) to Chicago (CHI).
Price to beat on a one-way flight from London (LON) to Chicago (CHI).

Find flight deals from London to Chicago

Cheapest flights from London to Chicago
Explore the most affordable flight options available from London to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Wed 20/818:45LHR - ORD
1 stop23h 50mTAP AIR PORTUGAL
Mon 25/818:10ORD - LHR
1 stop21h 50mTAP AIR PORTUGAL
Deal found 1/7£407
Sat 23/814:00LGW - ORD
1 stop32h 10mMultiple Airlines
Mon 8/917:17ORD - LGW
1 stop34h 43mMultiple Airlines
Deal found 3/7£408
Thu 21/810:35LGW - ORD
1 stop35h 35mTAP AIR PORTUGAL
Sat 13/918:15ORD - LGW
1 stop33h 30mTAP AIR PORTUGAL
Deal found 2/7£409
Sat 13/919:30LHR - ORD
1 stop23h 50mAustrian Airlines
Tue 23/916:00ORD - LHR
Nonstop8h 20mAustrian Airlines
Deal found 3/7£410
Sat 15/1111:55LGW - ORD
1 stop11h 25mIcelandair
Sat 10/118:30ORD - LGW
1 stop10h 25mIcelandair
Deal found 1/7£410
Mon 1/909:50LHR - ORD
1 stop11h 55mBritish Airways
Tue 16/922:35ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 3/7£410
Thu 25/906:00LHR - ORD
1 stop13h 20mMultiple Airlines
Mon 29/921:25ORD - LHR
Nonstop8h 20mMultiple Airlines
Deal found 2/7£411
Mon 24/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sat 29/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/7£413
Thu 9/1007:30LHR - ORD
1 stop13h 25mLufthansa
Mon 13/1005:01ORD - LHR
1 stop22h 39mLufthansa
Deal found 2/7£415
Wed 10/908:40LHR - ORD
1 stop13h 15mUnited Airlines
Wed 17/910:35ORD - LHR
1 stop13h 20mUnited Airlines
Deal found 2/7£421
Sun 24/820:05LHR - ORD
1 stop22h 05mSWISS
Tue 9/919:05ORD - LHR
1 stop15h 20mSWISS
Deal found 3/7£423
Sat 8/1106:50LHR - ORD
2 stops14h 05mAir Canada
Sat 15/1113:59ORD - LHR
2 stops15h 21mAir Canada
Deal found 3/7£429

Cheapflights Fare Finder

Customise your flight search to find flights from London 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 4 July 2025.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

London

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 20/8

18:45-12:35

1 stop23h 50m

Chicago O'Hare Intl

Mon 25/8

18:10-22:00

1 stop21h 50m

£407

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 23/8

14:00-16:10

1 stop32h 10m

Chicago O'Hare Intl

Mon 8/9

17:17-10:00

1 stop34h 43m

£408

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 21/8

10:35-16:10

1 stop35h 35m

Chicago O'Hare Intl

Sat 13/9

18:15-09:45

1 stop33h 30m

£409

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 13/9

19:30-13:20

1 stop23h 50m

Chicago O'Hare Intl

Tue 23/9

16:00-06:20

Nonstop8h 20m

£410

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sat 15/11

11:55-17:20

1 stop11h 25m

Chicago O'Hare Intl

Sat 10/1

18:30-10:55

1 stop10h 25m

£410

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 1/9

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Tue 16/9

22:35-12:15

Nonstop7h 40m

£410

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 25/9

06:00-13:20

1 stop13h 20m

Chicago O'Hare Intl

Mon 29/9

21:25-11:45

Nonstop8h 20m

£411

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 24/11

10:20-16:45

1 stop12h 25m

Chicago O'Hare Intl

Sat 29/11

19:20-16:00

1 stop14h 40m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/10

07:30-14:55

1 stop13h 25m

Chicago O'Hare Intl

Mon 13/10

05:01-09:40

1 stop22h 39m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 10/9

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Wed 17/9

10:35-05:55

1 stop13h 20m

£421

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 51 results
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Best time to book a flight from London to Chicago

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

How far ahead should I book a flight from London to Chicago?

Use this chart to determine the optimal time to book a return flight from London to Chicago. Price data was last updated on 27 June 2025.

To ensure you get the cheapest price possible for a flight from London to Chicago, you should look to book at least 44 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from London to Chicago (average of £595). Flying from London 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 LON to CHI?

Find hourly flight availability from London 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 4 July 2025.

It’s typically best to fly out from London to Chicago in the evening. Doing so could potentially save you 26% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from London to Chicago?

Use this chart to determine the cheapest time to fly return from London to Chicago. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Chicago flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to Chicago

Explore weekly flight availability from London 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 4 July 2025.

The most flights from LON to CHI are scheduled on a Wednesday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).

How much does it cost for a return flight from London to Chicago?

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 4 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAustrian Airlines from London 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.

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from London 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 flying from London to Chicago round-trip?

    Our cheapest airline available from London to Chicago is TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £407 on this airline. Additional options worth looking into are Austrian Airlines and British Airways, starting at £410 and £410 round-trip. These flights start at 21% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £391. Aer Lingus flights start at £391 while deals on JetBlue start at £392 one-way.

  • What are the most popular routes from London to Chicago?

  • What are the most reliable airlines from London to Chicago?

    Before booking your flight to Chicago from London, check out the most reliable airlines to get you to your destination on time: Air Canada (89%), Austrian Airlines (89%), United Airlines( 89%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally £1,751, our data shows the cheapest flight currently is £376. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £366 for that flight.

  • Where are the most common stopover locations when flying from London to Chicago?

  • What are some popular things to do or see while on a stopover in Reykjavik?

    If you're on a stopover in Reykjavik and looking for things to do, consider visiting Harpa, National Cathedral, or Hallgrímskirkja. Harpa, National Cathedral, and Hallgrímskirkja are located about 23.3 mi, 23.0 mi, and 23.2 mi, respectively from Reykjavik Keflavik Intl. Those on a stopover in Reykjavik in need of a car hire can book one at Reykjavik Keflavik Intl for about £44.

  • What are some popular points of interest to see during a stopover in Dublin?

    The majority of Dublin visitors spend their time at Bord Gáis Energy Theatre, 3Olympia Theatre, and Vicar Street. Bord Gáis Energy Theatre, 3Olympia Theatre and Vicar Street are located about 5.7 mi, 5.7 mi, and 5.9 mi, respectively from Dublin if you are interested in checking them out. Travellers in need of a car in Dublin can hire one for about £20 per day.

  • Where are the least popular stopover locations for London to Chicago flights?

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

    Yes. In addition to deals on London to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Chicago?

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

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

    Yes. Cheapflights offers flight deals from London 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 London to Chicago?

    Currently, January is the cheapest month in which you can book a flight from London to Chicago (average of £595). Flying from London 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

Browse thousands of different options on Cheapflights for your next trip

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Fly from London to Chicago on these airlines

Choose from the following airlines for your flight from London to Chicago. Flights are based on user searches made on Cheapflights and were last updated on 4 July 2025.

Top 10 airlines flying from London to Chicago

Discover the top 10 airlines that operate flights from London 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 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£309Average£480FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£348Average£495FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£361Average£605FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£379Average£567FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£388Average£611FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£393Average£567FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£395Average£574FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£397Average£557FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£398Average£626FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£401Average£561FlexibilityNo cancel feeOn-time70%
Search British Airways 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 London to Chicago?

Cheapflights helps you search for flights from London to Chicago via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Chicago from London.

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

Need flexible booking options for your flight to Chicago from London? 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 London to Chicago become cheaper?

Not ready to book yet? You can track prices for flights from London to Chicago on Cheapflights with our Price Alert feature and get notified when better prices are available.

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