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$402+ Cheap flights from London (LON) to Chicago (CHI)

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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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1. Tell us where you want to go
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The best prices from London to Chicago are usually found in February or November, booked 64 days in advance, depart on a Thursday or Wednesday 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$527
(Lufthansa)

One-way from

$402
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$579

Good round-trip deal

$640 or less

Good one-way deal

$646 or less
Provider with most accurate pricing for London (LON)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Chicago (CHI) flights.
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From London (LON) to Chicago (CHI)
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One-way flight from London (LON) to Chicago (CHI)
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Highest demand for flights based on searches. 12% potential increase in price ($98 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from London (LON) to Chicago (CHI).
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Price to beat on a one-way flight from London (LON) to Chicago (CHI).
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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 February 20, 2025.

This Lufthansa deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/236:00 amLHR - ORD
1 stop12h 10mMultiple Airlines
Tue 4/294:05 pmORD - LHR
Nonstop8h 15mMultiple Airlines
Deal found 2/20$527
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/77:40 amLHR - ORD
1 stop12h 30mUnited Airlines
Tue 3/182:16 pmORD - LHR
1 stop10h 39mUnited Airlines
Deal found 2/20$528
This Gotogate deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/258:40 pmLHR - ORD
1 stop26h 40mIcelandair
Mon 3/36:30 pmORD - LHR
1 stop19h 00mIcelandair
Deal found 2/20$531
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/62:00 pmLGW - ORD
1 stop15h 28mMultiple Airlines
Tue 3/259:01 pmORD - LGW
2 stops30h 04mMultiple Airlines
Deal found 2/20$532
This Mytrip deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/216:00 amLHR - ORD
1 stop15h 30mTAP AIR PORTUGAL
Fri 2/288:20 pmORD - LHR
1 stop16h 35mTAP AIR PORTUGAL
Deal found 2/20$534
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:00 amLHR - ORD
1 stop12h 55mSWISS
Tue 3/188:05 pmORD - LHR
1 stop11h 55mSWISS
Deal found 2/20$536
This TravelUp deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/12:10 pmLHR - ORD
Nonstop8h 50mBritish Airways
Tue 3/189:15 pmORD - LHR
Nonstop7h 45mBritish Airways
Deal found 2/20$537
This StudentUniverse deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2311:05 amLHR - ORD
Nonstop8h 45mFinnair
Tue 4/294:55 pmORD - LHR
Nonstop7h 55mFinnair
Deal found 2/20$542
This ChecknFly deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/272:30 pmLHR - ORD
1 stop13h 36mLufthansa
Wed 4/29:20 pmORD - LHR
Nonstop8h 25mLufthansa
Deal found 2/20$543
This TAP AIR PORTUGAL deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/273:55 pmLGW - ORD
1 stop29h 35mTAP AIR PORTUGAL
Wed 4/26:00 pmORD - LGW
1 stop14h 00mTAP AIR PORTUGAL
Deal found 2/20$545
This SWISS deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:40 pmLGW - ORD
1 stop27h 35mSWISS
Mon 3/105:55 pmORD - LGW
2 stops18h 55mSWISS
Deal found 2/20$549
This oojo deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/151:00 pmLGW - ORD
1 stop11h 15mIcelandair
Thu 5/227:25 pmORD - LGW
1 stop13h 15mIcelandair
Deal found 2/20$550

Find flights from London to Chicago within your budget

Customize 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 2,558,603 searches. Data last updated February 20, 2025.

Fly from

London

Fly to

Chicago

Route

Depart

Return

Price

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/23

6:00 am-12:10 pm

1 stop12h 10m

Chicago O'Hare Intl

Tue 4/29

4:05 pm-6:20 am

Nonstop8h 15m

$527

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 3/7

7:40 am-2:10 pm

1 stop12h 30m

Chicago O'Hare Intl

Wed 3/12

12:48 pm-5:55 am

1 stop12h 07m

$528

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 3/6

2:00 pm-11:28 pm

1 stop15h 28m

Chicago O'Hare Intl

Tue 3/25

9:01 pm-8:05 am

2 stops30h 04m

$532

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 3/8

7:40 am-2:10 pm

1 stop12h 30m

Chicago O'Hare Intl

Wed 3/12

4:15 pm-8:45 am

1 stop11h 30m

$534

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 3/6

6:00 am-12:55 pm

1 stop12h 55m

Chicago O'Hare Intl

Tue 3/18

8:05 pm-1:00 pm

1 stop11h 55m

$536

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 3/12

10:25 am-2:50 pm

Nonstop9h 25m

Chicago O'Hare Intl

Wed 3/26

6:50 pm-7:55 am

Nonstop8h 05m

$537

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 4/15

9:25 pm-9:15 pm

1 stop29h 50m

Chicago O'Hare Intl

Tue 4/29

7:30 pm-11:55 am

1 stop10h 25m

$539

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 3/6

11:55 am-2:45 pm

Nonstop8h 50m

Chicago O'Hare Intl

Mon 3/10

9:15 pm-10:00 am

Nonstop7h 45m

$540

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 4/23

11:05 am-1:50 pm

Nonstop8h 45m

Chicago O'Hare Intl

Tue 4/29

4:55 pm-6:50 am

Nonstop7h 55m

$542

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 3/6

6:40 pm-4:15 pm

1 stop27h 35m

Chicago O'Hare Intl

Mon 3/10

5:55 pm-5:50 pm

2 stops18h 55m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 60 results
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Compare providers for flights from London to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Chicago in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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.

Travel insights for flights from London to Chicago

Get recent, data-driven insights about flights from London to Chicago including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from London to Chicago. Price data was last updated on February 14, 2025.

The best time to book flights from London to Chicago is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $321). 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 February 20, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 31% on flights from London to Chicago by exploring options for tickets in the evening.

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

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

Travelers seeking maximum savings on their London to Chicago flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday 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 February 20, 2025.

The most flights from LON to CHI are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (33 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 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 February 20, 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat from London to Chicago. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

Air Transat
7.8
Good
380 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

LOT
7.6
Good
1,080 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

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?

    Currently priced at $528, United Airlines will fly you from London to Chicago and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and SWISS - these airlines can fly you to your destination from $534 and $536, respectively. United Airlines is currently priced 25% below the average price you’ll pay for this route.

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

    $450 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Transat and Icelandair, with prices starting from $493 and $504, respectively.

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

    While some choose either London Gatwick - Chicago O'Hare Intl or London City - Chicago O'Hare Intl, London Heathrow - Chicago O'Hare Intl is the most popular route 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 (91%), Austrian Airlines (91%), United Airlines( 91%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally $1,316, our data shows the cheapest flight currently is $547. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $442 for that flight.

  • 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 vacation 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, August is the cheapest month in which you can book a flight from London to Chicago (average of $245). Flying from London to Chicago in March is currently the most expensive (average of $321). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
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Alternative routes for London to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to O'Hare Intl flights
Gatwick to O'Hare Intl flights
London City to O'Hare Intl flights
Heathrow to Midway flights
Luton to O'Hare Intl flights
Stansted to O'Hare Intl flights
Manchester to O'Hare Intl flights
Heathrow to St. Louis flights
Birmingham to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Gatwick to St. Louis flights
Birmingham to Midway flights
Manchester to St. Louis flights
Bristol to O'Hare Intl flights
Newcastle upon Tyne to O'Hare Intl flights
Leeds to O'Hare Intl flights
Edinburgh to St. Louis flights
Liverpool to O'Hare Intl flights
Southampton to O'Hare Intl flights
Birmingham to St. Louis flights
Heathrow to Evansville flights
Norwich to O'Hare Intl flights
Newcastle upon Tyne to St. Louis flights
Leeds to St. Louis flights
Exeter to O'Hare Intl flights
Gatwick to Evansville flights
Liverpool to St. Louis flights

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 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$390Average$582FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$666FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$729FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$556Average$782FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$576Average$736FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$579Average$963FlexibilityNo cancel feeOn-time69%
IberiaCheapest$582Average$793FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$589Average$797FlexibilityNo cancel feeOn-time70%
FinnairCheapest$607Average$866FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$1,067FlexibilityNo cancel feeOn-time76%
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