Cheap flights from London to Chicago from £402

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Chicago are usually found in February or September, booked 88 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

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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 November 2025.

Sun 23/1106:40LHR - ORD
2 stops16h 05mScandinavian Airlines
Sun 30/1119:20ORD - LHR
2 stops17h 30mScandinavian Airlines
Deal found 3/11£406
Wed 26/1119:30LHR - ORD
1 stop27h 15mScandinavian Airlines
Mon 1/1219:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 2/11£406
Fri 21/1107:05LHR - ORD
2 stops15h 40mScandinavian Airlines
Sun 23/1119:20ORD - LHR
2 stops15h 05mScandinavian Airlines
Deal found 2/11£407
Wed 12/1121:05LHR - ORD
2 stops25h 40mScandinavian Airlines
Wed 26/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 3/11£408
Thu 13/1121:05LHR - ORD
2 stops25h 40mScandinavian Airlines
Mon 17/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/11£410
Mon 24/1114:00LGW - ORD
1 stop15h 06mMultiple Airlines
Fri 28/1106:48ORD - LGW
1 stop21h 12mMultiple Airlines
Deal found 2/11£410
Mon 17/1107:05LHR - ORD
2 stops15h 40mScandinavian Airlines
Mon 1/1219:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/11£410
Wed 12/1114:45STN - ORD
2 stops32h 00mMultiple Airlines
Wed 26/1119:20ORD - STN
2 stops19h 45mMultiple Airlines
Deal found 3/11£410
Mon 15/1206:40LHR - ORD
1 stop16h 05mScandinavian Airlines
Fri 30/119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 1/11£413
Thu 20/1114:00LGW - ORD
1 stop23h 26mMultiple Airlines
Tue 2/1216:22ORD - LGW
2 stops31h 38mMultiple Airlines
Deal found 1/11£413
Mon 17/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Mon 24/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/11£413
Fri 21/1110:20LHR - ORD
1 stop12h 25mScandinavian Airlines
Sat 29/1119:20ORD - LHR
1 stop14h 40mScandinavian Airlines
Deal found 2/11£415

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 November 2025.

Round-trip from

£406

One-way from

£402

Popular in

July

Cheapest in

February

Average price

£490

Good round-trip deal

£580 or less

Good one-way deal

£458 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 23/11-30/11
  • 4 total stops
  • 33h 35m total
  • London to Chicago
Delta
  • Delta
  • 19/4
  • 2 total stops
  • 17h 03m total
  • London to Chicago
Highest demand for flights based on searches. 13% potential increase in price (£62 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 November 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).

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 November 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

Mon 15/12

06:40-16:45

1 stop16h 05m

Chicago O'Hare Intl

Mon 2/2

19:20-16:00

1 stop14h 40m

£413

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 20/11

09:00-17:55

1 stop14h 55m

Chicago O'Hare Intl

Sun 23/11

19:40-11:45

1 stop10h 05m

£415

LondonChicago

LTN - ORD

LTNORD

London Luton

Wed 19/11

06:50-17:20

2 stops16h 30m

Chicago O'Hare Intl

Wed 3/12

18:30-23:05

2 stops22h 35m

£419

LondonChicago

LTN - ORD

LTNORD

London Luton

Thu 20/11

09:00-14:00

1 stop11h 00m

Chicago O'Hare Intl

Tue 2/12

15:50-09:45

1 stop11h 55m

£423

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 18/11

21:05-16:45

2 stops25h 40m

Chicago O'Hare Intl

Wed 26/11

19:20-18:30

1 stop17h 10m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 16/12

19:50-16:45

2 stops26h 55m

Chicago O'Hare Intl

Wed 31/12

19:20-21:35

2 stops20h 15m

£425

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 25/11

19:50-16:45

2 stops26h 55m

Chicago O'Hare Intl

Wed 11/2

19:20-18:50

2 stops17h 30m

£425

LondonChicago

STN - ORD

STNORD

London Stansted

Wed 3/12

06:30-14:00

1 stop13h 30m

Chicago O'Hare Intl

Wed 10/12

19:40-15:05

1 stop13h 25m

£425

LondonChicago

LTN - ORD

LTNORD

London Luton

Sat 15/11

06:00-17:55

1 stop17h 55m

Chicago O'Hare Intl

Sun 23/11

15:50-11:45

1 stop13h 55m

£426

LondonChicago

LTN - ORD

LTNORD

London Luton

Tue 18/11

09:00-17:55

1 stop14h 55m

Chicago O'Hare Intl

Tue 25/11

15:50-09:45

1 stop11h 55m

£426

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 60 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 31 October 2025.

To ensure you get the cheapest price possible for a flight from London to Chicago, you should look to book at least 88 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, March is the cheapest month in which you can book a flight from London to Chicago (average of £308). Flying from London to Chicago in July is currently the most expensive (average of £512). 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 November 2025.

It’s typically best to fly out from London to Chicago in the morning. Doing so could potentially save you 8% on the flight price compared to flying in the evening, 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 Thursday afternoons when fares are most often at their lowest. Sunday at midday 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 November 2025.

The most flights from LON to CHI are scheduled on a Sunday (43 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (33 on average).

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 46% 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.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £353.

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: 10h 57m.

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 Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 14m.

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 November 2025.
Read reviews from past customers who have flown with Finnair, 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.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 15h 38m. Scandinavian Airlines provides one of the quickest options available for as low as £521. Airlines will cover a distance of 3942 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 Icelandair. Our recent data shows that you can find tickets from as low as £321 on this airline. Additional options worth looking into are Virgin Atlantic and Scandinavian Airlines, starting at £352 and £363 round-trip. These flights start at 39% 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 Delta, which is currently one of the cheapest options available, starting at £402. Virgin Atlantic flights start at £403 while deals on Austrian Airlines start at £404 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 (84%), Austrian Airlines (84%), United Airlines( 84%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally £1,270, our data shows the cheapest flight currently is £370. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £384 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 Reykjavik Free Church. Harpa, National Cathedral, and Reykjavik Free Church are located about 23.3 mi, 23.0 mi, and 22.9 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 £34.

  • 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 Dublin Castle. Bord Gáis Energy Theatre, 3Olympia Theatre and Dublin Castle are located about 5.7 mi, 5.7 mi, and 5.8 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 £16 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, March is the cheapest month in which you can book a flight from London to Chicago (average of £308). Flying from London to Chicago in July is currently the most expensive (average of £512). 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 4 November 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 November 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£321Average£497FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£352Average£570FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£367Average£491FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£376Average£624FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£378Average£602FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Brussels AirlinesCheapest£394Average£552FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£405Average£588FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£413Average£580FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£413Average£615FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£417Average£553FlexibilityNo 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 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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