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Cheap flights from London to Chicago from £370

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
9 Sep — 16 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Chicago are usually found in February or September, booked 42 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap flight deals from London to Chicago

Enter your travel dates to find the best prices.

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 10 August 2026.

Thu 24/917:30 -
2 stops26h 45m
Tue 29/916:15 -
2 stops23h 00m
Deal found 7/8£478
Fri 11/912:15 -
1 stop12h 22m
Fri 11/921:30 -
Nonstop8h 25m
Deal found 7/8£478
Wed 2/906:15 -
1 stop13h 45m
Tue 15/921:00 -
1 stop10h 25m
Deal found 6/8£478
Tue 1/906:30 -
1 stop13h 30m
Sun 13/921:00 -
1 stop20h 25m
Deal found 6/8£478
Thu 3/913:10 -
1 stop12h 05m
Tue 8/921:00 -
1 stop18h 15m
Deal found 6/8£479
Tue 1/909:40 -
1 stop15h 35m
Tue 8/921:00 -
1 stop12h 30m
Deal found 9/8£479
Mon 7/906:30 -
1 stop13h 30m
Mon 21/915:45 -
1 stop10h 05m
Deal found 8/8£479
Tue 22/916:25 -
1 stop29h 35m
Wed 21/1018:00 -
1 stop33h 45m
Deal found 5/8£479
Fri 4/906:35 -
1 stop13h 25m
Fri 11/921:00 -
1 stop18h 20m
Deal found 5/8£479
Thu 1/1019:50 -
1 stop26h 10m
Sun 11/1018:00 -
1 stop34h 20m
Deal found 5/8£480
Sat 5/913:15 -
1 stop12h 00m
Sun 13/921:00 -
1 stop20h 25m
Deal found 6/8£480
Sat 5/908:50 -
1 stop16h 25m
Sat 12/915:45 -
1 stop10h 30m
Deal found 6/8£481

Find 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 10 August 2026.

Round-trip from

£471

One-way from

£370

Popular in

July

Cheapest in

February

Average price

£693

Good round-trip deal

£623 or less

Good one-way deal

£533 or less
12/11-16/11
  • 12/11-16/11
  • 2 total stops
  • 25h 40m total
  • London to Chicago
Search Deals
15/9
  • 15/9
  • 2 total stops
  • 39h 30m total
  • London to Chicago
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£85 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 August 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from London (LON) to Chicago (CHI).
Search Deals

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 10 August 2026.
Use the filters below to find and compare flights from London to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Mon 7/9

08:15-14:00

1 stop11h 45m

Chicago O'Hare Intl

Mon 21/9

15:45-09:15

1 stop11h 30m

£485

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Thu 8/10

06:20-19:50

2 stops19h 30m

Chicago O'Hare Intl

Tue 13/10

21:50-23:45

2 stops19h 55m

£529

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 7/10

09:15-21:25

2 stops18h 10m

Chicago O'Hare Intl

Sat 10/10

19:25-21:05

2 stops19h 40m

£533

LondonChicago

LTN London Luton - ORD Chicago O'Hare Intl

LTNORD

London Luton

Wed 7/10

18:30-19:50

2 stops31h 20m

Chicago O'Hare Intl

Fri 16/10

17:10-18:35

2 stops19h 25m

£536

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Thu 10/9

18:45-16:00

1 stop27h 15m

Chicago O'Hare Intl

Thu 24/9

18:00-12:45

1 stop12h 45m

£537

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 8/9

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Thu 10/12

18:30-10:55

1 stop10h 25m

£552

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Wed 9/9

15:40-21:25

1 stop11h 45m

Chicago O'Hare Intl

Wed 23/9

22:25-14:40

1 stop10h 15m

£566

LondonChicago

LHR London Heathrow - ORD Chicago O'Hare Intl

LHRORD

London Heathrow

Wed 23/12

06:00-15:30

1 stop15h 30m

Chicago O'Hare Intl

Sun 3/1

20:10-17:30

1 stop15h 20m

£577

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 25/8

15:40-18:15

1 stop32h 35m

Chicago O'Hare Intl

Sat 5/9

19:25-11:45

1 stop10h 20m

£581

LondonChicago

LGW London Gatwick - ORD Chicago O'Hare Intl

LGWORD

London Gatwick

Tue 8/9

21:15-16:00

2 stops24h 45m

Chicago O'Hare Intl

Fri 11/12

20:10-15:45

1 stop13h 35m

£588

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, February is the cheapest month in which you can book a flight from London to Chicago (average of £462). Flying from London to Chicago in July is currently the most expensive (average of £759). 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 10 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Chicago as you normally would.

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 10 August 2026.

The most flights from LON to CHI are scheduled on a Saturday (52 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (41 on average).

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

Airfare is below average for this route at the moment.
London to Chicago flights typically cost between £559 and £858 in November.
The cheapest return price found within the last 5 days was £471 on Multiple Airlines (12 Nov–16 Nov).

What’s the top stopover airport for flights from London to Chicago?

Share of one-stop return flights from London to Chicago chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 50% of one-stop itineraries from London to Chicago on Cheapflights.

What’s the cheapest stopover airport for flights from London to Chicago?

Average return fare for one-stop flights from London to Chicago, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £343.

What’s the fastest stopover option from London to Chicago?

Shortest average travel time for one-stop one-way flights from London to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 00m.

Which airport typically offers the quickest stopover for flights from London to Chicago?

Average stopover duration for one-stop one-way flights from London to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Zurich (ZRH) offer the fastest connection on this route, with an average stopover time of 1h 13m.

How often are flights from London to Chicago delayed?

About 11% of weekly flights between London and Chicago have experienced delays in the past year, with the average delay time being 182 minutes.

What is the most punctual flight time for London to Chicago flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Chicago flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 6% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from London to Chicago, you should look to book at least 79 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.

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 August 2026.
Read reviews from past customers who have flown with United Airlines,Aer Lingus, andIcelandair 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.
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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
10,101 reviews
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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
7.3
Good
1,693 reviews
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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
6.9
Okay
728 reviews
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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
8,177 reviews
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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
8,154 reviews
United Airlines
7.4
Good
10,101 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.7

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 London 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 London to Chicago?

    A quick flight from London to Chicago can take about 11h 45m. TAP AIR PORTUGAL provides one of the quickest options available for as low as £552. Airlines will cover a distance of 3960 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London to Chicago round-trip?

    Our cheapest airline available from London to Chicago is Virgin Atlantic. Our recent data shows that you can find tickets from as low as £301 on this airline. Additional options worth looking into are Icelandair and Aer Lingus, starting at £349 and £362 round-trip. These flights start at 48% 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 JetBlue, which is currently one of the cheapest options available, starting at £309. Icelandair flights start at £324 while deals on TAP AIR PORTUGAL start at £338 one-way.

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

    The most popular flight routes from London 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 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 (90%), Austrian Airlines (90%), United Airlines( 90%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally £3,115, our data shows the cheapest flight currently is £408. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £385 for that flight.

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

    London to Chicago flights have a stopover in Dublin most of the time.

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

    If you're on a stopover in Dublin and looking for things to do, consider visiting 3Olympia Theatre, Bord Gáis Energy Theatre, or Vicar Street. 3Olympia Theatre, Bord Gáis Energy Theatre, and Vicar Street are located about 5.7 mi, 5.7 mi, and 5.9 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £29.

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

    London to Chicago flights have a stopover in Reykjavik least often.

  • 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, February is the cheapest month in which you can book a flight from London to Chicago (average of £462). Flying from London to Chicago in July is currently the most expensive (average of £759). 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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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 10 August 2026.
British Airways flights from London to Chicago
Lufthansa flights from London to Chicago
Finnair flights from London to Chicago

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 10 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£301Average£605FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£349Average£501FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£362Average£674FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£374Average£536FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
JetBlueCheapest£382Average£679FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
TAP AIR PORTUGALCheapest£385Average£572FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£393Average£612FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£403Average£646FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£408Average£673FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£426Average£715FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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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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