Cheap flights from London to Chicago from £427

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
22 Jun — 29 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Chicago are usually found in February or November, booked 35 days in advance, depart on a Thursday or Wednesday and return on a Sunday

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 23 May 2026.

Tue 8/913:00
LGW
-
ORD
1 stop11h 15m
Icelandair
Wed 16/922:25
ORD
-
LGW
1 stop10h 15m
Icelandair
Deal found 17/5£513
Fri 9/1013:05
LHR
-
ORD
1 stop14h 20m
Icelandair
Fri 16/1022:25
ORD
-
LHR
1 stop15h 55m
Icelandair
Deal found 18/5£513
Thu 8/1015:40
LGW
-
ORD
1 stop32h 35m
Icelandair
Tue 13/1019:25
ORD
-
LGW
1 stop13h 15m
Icelandair
Deal found 18/5£514
Wed 27/515:00
STN
-
ORD
2 stops33h 15m
Multiple Airlines
Mon 1/622:25
ORD
-
STN
2 stops14h 25m
Multiple Airlines
Deal found 18/5£518
Sat 24/1006:40
LHR
-
ORD
1 stop15h 30m
Scandinavian Airlines
Sat 7/1119:15
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Deal found 18/5£520
Wed 2/921:15
LGW
-
ORD
2 stops21h 25m
TAP AIR PORTUGAL
Wed 23/918:00
ORD
-
LGW
1 stop14h 00m
TAP AIR PORTUGAL
Deal found 18/5£521
Fri 2/1007:05
LHR
-
ORD
2 stops15h 05m
Scandinavian Airlines
Mon 5/1019:15
ORD
-
LHR
2 stops15h 10m
Scandinavian Airlines
Deal found 21/5£521
Fri 12/609:40
LGW
-
ORD
2 stops16h 36m
Multiple Airlines
Tue 16/607:25
ORD
-
LGW
1 stop21h 20m
Multiple Airlines
Deal found 21/5£522
Wed 14/1007:05
LHR
-
ORD
2 stops15h 05m
Scandinavian Airlines
Wed 28/1020:15
ORD
-
LHR
2 stops17h 35m
Scandinavian Airlines
Deal found 23/5£522
Wed 14/1016:25
LGW
-
ORD
1 stop26h 15m
TAP AIR PORTUGAL
Wed 21/1018:00
ORD
-
LGW
2 stops35h 20m
TAP AIR PORTUGAL
Deal found 21/5£523
Fri 9/1017:00
LHR
-
ORD
1 stop29h 10m
Scandinavian Airlines
Sun 18/1019:15
ORD
-
LHR
2 stops20h 20m
Scandinavian Airlines
Deal found 20/5£523
Tue 15/916:25
LGW
-
ORD
1 stop29h 35m
TAP AIR PORTUGAL
Wed 30/918:00
ORD
-
LGW
2 stops20h 30m
TAP AIR PORTUGAL
Deal found 20/5£523

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 23 May 2026.

Round-trip from

£513

One-way from

£427

Popular in

July

Cheapest in

February

Average price

£581

Good round-trip deal

£697 or less

Good one-way deal

£555 or less
Icelandair
  • Icelandair
  • 8/9-16/9
  • 2 total stops
  • 21h 30m total
  • London to Chicago
5/6
  • 5/6
  • 1 total stop
  • 26h 55m total
  • London to Chicago
Highest demand for flights based on searches. 11% potential increase in price (£51 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 May 2026
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 23 May 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
Fastest return journey

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 7/9

08:00-11:05

Nonstop9h 05m

Chicago O'Hare Intl

Tue 29/9

16:25-06:45

Nonstop8h 20m

£526

LondonChicago

SEN - ORD

SENORD

London Southend

Mon 1/6

11:10-12:35

2 stops31h 25m

Chicago O'Hare Intl

Sun 7/6

08:45-10:30

2 stops19h 45m

£578

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 8/9

13:05-18:15

1 stop11h 10m

Chicago O'Hare Intl

Sat 3/10

19:25-11:55

1 stop10h 30m

£589

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 12/10

08:25-19:50

1 stop17h 25m

Chicago O'Hare Intl

Mon 19/10

21:50-19:05

1 stop15h 15m

£589

LondonChicago

LTN - ORD

LTNORD

London Luton

Fri 25/9

08:30-18:15

2 stops15h 45m

Chicago O'Hare Intl

Sun 27/9

22:25-22:20

2 stops17h 55m

£602

LondonChicago

LTN - ORD

LTNORD

London Luton

Wed 23/9

08:25-19:50

1 stop17h 25m

Chicago O'Hare Intl

Wed 30/9

17:10-14:35

1 stop15h 25m

£609

LondonChicago

LGW - MDW

LGWMDW

London Gatwick

Fri 12/6

11:35-09:35

2 stops28h 00m

Chicago Midway

Tue 16/6

10:15-07:55

2 stops15h 40m

£613

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 13/9

19:50-16:10

2 stops26h 20m

Chicago O'Hare Intl

Sat 19/9

19:15-16:25

2 stops15h 10m

£614

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 14/9

20:05-12:35

1 stop22h 30m

Chicago O'Hare Intl

Fri 25/9

19:05-16:25

1 stop15h 20m

£616

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 27/8

07:05-16:10

2 stops15h 05m

Chicago O'Hare Intl

Sat 5/9

19:15-18:50

2 stops17h 35m

£616

Flights are sorted by cheapest return flights first.

Deals found on 22/5

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, September is the cheapest month in which you can book a flight from London to Chicago (average of £430). Flying from London to Chicago in January is currently the most expensive (average of £1,227). 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 23 May 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 23 May 2026.

The most flights from LON to CHI are scheduled on a Wednesday (52 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (49 on average).

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

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 54% 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.

Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £374.

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 50m.

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 16m.

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 180 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 evening 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 Friday 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 5% 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 34 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 23 May 2026.
Read reviews from past customers who have flown with Austrian Airlines,United Airlines, 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.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

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 9h 05m. Austrian Airlines provides one of the quickest options available for as low as £526. Airlines will cover a distance of 3939 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 £345 on this airline. Additional options worth looking into are Icelandair and Aer Lingus, starting at £349 and £364 round-trip. These flights start at 35% 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 £311. Icelandair flights start at £325 while deals on TAP AIR PORTUGAL start at £336 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: SriLankan Airlines (94%), Air Canada (90%), Austrian Airlines( 90%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally £1,199, our data shows the cheapest flight currently is £453. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £415 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 Dublin?

    If you're on a stopover in Dublin and looking for things to do, consider visiting 3Olympia Theatre, Bord Gáis Energy Theatre, or Button Factory. 3Olympia Theatre, Bord Gáis Energy Theatre, and Button Factory are located about 5.7 mi, 5.7 mi, and 5.7 mi, respectively from Dublin. Those on a stopover in Dublin in need of a car hire can book one at Dublin for about £19.

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

    The majority of Reykjavik visitors spend their time at Harpa, National Cathedral, and 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 if you are interested in checking them out. Travellers in need of a car in Reykjavik can hire one for about £38 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, September is the cheapest month in which you can book a flight from London to Chicago (average of £430). Flying from London to Chicago in January is currently the most expensive (average of £1,227). 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 23 May 2026.

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 23 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£345Average£581FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£349Average£507FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£364Average£649FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£369Average£520FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£385Average£514FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£394Average£585FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£395Average£618FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£396Average£615FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austrian AirlinesCheapest£404Average£641FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£415Average£628FlexibilityNo 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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