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Cheap flights from London to Chicago from £380

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 23/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
23 Apr — 30 Apr1
1 adult

Cheapflights Tip: The best prices from London to Chicago are usually found in February or March, booked 69 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 18 April 2025.

Round-trip from

£413

One-way from

£380

Popular in

August

Cheapest in

February

Average price

£510

Good round-trip deal

£540 or less

Good one-way deal

£544 or less
SWISS
  • SWISS
  • 6/5-13/5
  • 2 total stops
  • 44h 05m total
  • London to Chicago
23/5
  • 23/5
  • 3 total stops
  • 27h 55m total
  • London to Chicago
Highest demand for flights based on searches. 12% potential increase in price (£60 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in April 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 18 April 2025.

Tue 6/518:35LGW - ORD
1 stop27h 20mSWISS
Tue 13/519:05ORD - LGW
1 stop16h 45mSWISS
Deal found 18/4£413
Thu 24/406:00LHR - ORD
1 stop12h 45mMultiple Airlines
Wed 7/521:20ORD - LHR
Nonstop8h 25mMultiple Airlines
Deal found 17/4£413
Fri 25/406:00LHR - ORD
1 stop12h 10mSWISS
Mon 5/518:35ORD - LHR
1 stop12h 25mSWISS
Deal found 17/4£415
Thu 24/406:00LHR - ORD
1 stop13h 20mAustrian Airlines
Wed 30/418:05ORD - LHR
Nonstop8h 15mAustrian Airlines
Deal found 17/4£417
Thu 15/515:40LGW - ORD
1 stop11h 35mIcelandair
Wed 28/519:25ORD - LGW
1 stop10h 20mIcelandair
Deal found 17/4£418
Sat 3/513:30LHR - ORD
1 stop12h 25mLufthansa
Fri 16/518:05ORD - LHR
Nonstop8h 15mLufthansa
Deal found 18/4£418
Thu 24/408:40LHR - ORD
2 stops15h 42mAir Canada
Thu 1/514:00ORD - LHR
1 stop10h 35mAir Canada
Deal found 17/4£419
Fri 9/506:50LHR - ORD
1 stop11h 10mUnited Airlines
Sun 18/508:40ORD - LHR
1 stop15h 50mUnited Airlines
Deal found 18/4£420
Mon 12/513:05LGW - ORD
1 stop24h 22mMultiple Airlines
Fri 16/519:35ORD - LGW
2 stops28h 45mMultiple Airlines
Deal found 17/4£421
Thu 24/409:15LHR - ORD
Nonstop8h 30mBritish Airways
Sun 27/420:20ORD - LHR
Nonstop8h 10mBritish Airways
Deal found 16/4£422
Wed 21/509:05STN - ORD
2 stops18h 10mMultiple Airlines
Mon 26/519:25ORD - STN
2 stops19h 35mMultiple Airlines
Deal found 18/4£424
Thu 15/513:00LHR - ORD
1 stop34h 50mAmerican Airlines
Tue 20/511:45ORD - LHR
1 stop12h 45mAmerican Airlines
Deal found 18/4£430

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 18 April 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

LGW - ORD

LGWORD

London Gatwick

Tue 6/5

18:35-15:55

1 stop27h 20m

Chicago O'Hare Intl

Tue 13/5

19:05-17:50

1 stop16h 45m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 7/5

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Mon 12/5

18:05-08:20

Nonstop8h 15m

£413

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 6/5

08:45-18:22

2 stops15h 37m

Chicago O'Hare Intl

Tue 13/5

15:35-10:00

1 stop12h 25m

£415

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 28/4

06:00-12:45

1 stop12h 45m

Chicago O'Hare Intl

Thu 8/5

18:35-16:25

1 stop15h 50m

£416

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 28/4

19:30-13:20

1 stop23h 50m

Chicago O'Hare Intl

Mon 5/5

21:20-11:45

Nonstop8h 25m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 1/5

13:30-19:55

1 stop12h 25m

Chicago O'Hare Intl

Mon 5/5

18:05-08:20

Nonstop8h 15m

£418

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 15/5

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Wed 28/5

19:25-11:45

1 stop10h 20m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 14/5

08:40-15:55

1 stop13h 15m

Chicago O'Hare Intl

Wed 21/5

21:05-06:55

1 stop27h 50m

£419

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Mon 12/5

13:05-07:27

1 stop24h 22m

Chicago O'Hare Intl

Fri 16/5

19:35-06:20

2 stops28h 45m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 29/4

14:25-17:00

Nonstop8h 35m

Chicago O'Hare Intl

Wed 7/5

22:25-12:15

Nonstop7h 50m

£422

Flights are sorted by cheapest return flights first.

Deals found on 17/4

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 11 April 2025.

To ensure you get the cheapest price possible for a flight from London to Chicago, you should look to book at least 69 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 18 April 2025.

It’s typically best to fly out from London to Chicago in the evening. Doing so could potentially save you 24% 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 28 April 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 18 April 2025.

The most flights from LON to CHI are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (45 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 18 April 2025.
Peruse reviews from past customers who have flown with Delta, KLM and LOT from London to Chicago to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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
8.0
Very Good

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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

Comfort

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

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 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 SWISS. Our recent data shows that you can find tickets from as low as £413 on this airline. Additional options worth looking into are Air Canada and Austrian Airlines, starting at £415 and £417 round-trip. These flights start at 22% 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £380. WestJet flights start at £381 while deals on Aer Lingus start at £386 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: United Airlines (90%), SWISS (89%), Air Canada( 87%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally £1,495, our data shows the cheapest flight currently is £420. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £367 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 National Cathedral, Hallgrímskirkja, or Harpa. National Cathedral, Hallgrímskirkja, and Harpa are located about 23.0 mi, 23.2 mi, and 23.3 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 £38.

  • 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 Button Factory. Bord Gáis Energy Theatre, 3Olympia Theatre and Button Factory are located about 5.7 mi, 5.7 mi, and 5.7 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 £21 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 18 April 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 18 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£317Average£486FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£359Average£504FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£372Average£597FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapest£409Average£560FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Austrian AirlinesCheapest£412Average£565FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
United AirlinesCheapest£414Average£585FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£418Average£598FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£420Average£573FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Brussels AirlinesCheapest£427Average£661FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Aer LingusCheapest£434Average£581FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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