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$494+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Find cheap flights from London to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$544
(World Air Fares)

One-way from

$494
(Norse)

Popular in

August

Cheapest in

February

Average price

$676

Good round-trip deal

$645 or less

Good one-way deal

$671 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. 13% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This World Air Fares deal was found by Cheapflights users on 4/14. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/712:20 pmLGW - ORD
2 stops17h 51mFinnair
Wed 5/147:50 amORD - LGW
2 stops18h 20mFinnair
Deal found 4/14$544
This Lufthansa deal was found by Cheapflights users on 4/13. 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.
Sun 4/206:00 amLHR - ORD
1 stop12h 10mMultiple Airlines
Sat 5/34:05 pmORD - LHR
Nonstop8h 15mMultiple Airlines
Deal found 4/13$544
This Mytrip deal was found by Cheapflights users on 4/14. 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.
Thu 5/82:00 pmLGW - ORD
2 stops34h 40mMultiple Airlines
Wed 5/149:55 amORD - LGW
1 stop15h 00mMultiple Airlines
Deal found 4/14$545
This SmartFares deal was found by Cheapflights users on 4/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/208:40 amLHR - ORD
1 stop11h 30mVirgin Atlantic
Sat 5/36:59 pmORD - LHR
1 stop12h 11mVirgin Atlantic
Deal found 4/13$546
This Austrian Airlines deal was found by Cheapflights users on 4/13. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/209:05 amLHR - ORD
1 stop34h 15mAustrian Airlines
Sat 5/311:14 amORD - LHR
1 stop17h 26mAustrian Airlines
Deal found 4/13$547
This Lufthansa deal was found by Cheapflights users on 4/14. 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 5/76:55 amLHR - ORD
1 stop13h 00mLufthansa
Mon 5/126:05 pmORD - LHR
Nonstop8h 15mLufthansa
Deal found 4/14$548
This Gotogate deal was found by Cheapflights users on 4/13. 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.
Sun 4/206:00 amLHR - ORD
2 stops19h 30mAir Canada
Sat 5/33:35 pmORD - LHR
1 stop12h 25mAir Canada
Deal found 4/13$549
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Wed 4/306:35 pmLGW - ORD
1 stop27h 20mSWISS
Thu 5/86:35 pmORD - LGW
1 stop17h 15mSWISS
Deal found 4/14$554
This TravelUp deal was found by Cheapflights users on 4/14. 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 4/2612:15 pmLHR - ORD
Nonstop8h 30mBritish Airways
Sun 5/48:20 pmORD - LHR
Nonstop8h 10mBritish Airways
Deal found 4/14$554
This Ticket deal was found by Cheapflights users on 4/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2011:20 amLHR - MDW
1 stop12h 39mVirgin Atlantic
Sat 5/37:00 pmMDW - LHR
1 stop12h 10mVirgin Atlantic
Deal found 4/13$554
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Wed 5/72:00 pmLGW - MDW
1 stop28h 24mMultiple Airlines
Mon 5/121:19 pmMDW - LGW
1 stop14h 41mMultiple Airlines
Deal found 4/14$557
This FlightHub deal was found by Cheapflights users on 4/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/61:05 pmLHR - ORD
1 stop11h 10mIcelandair
Wed 5/147:25 pmORD - LHR
1 stop10h 30mIcelandair
Deal found 4/14$558

Cheapflights Fare Finder

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 April 15, 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

Wed 5/7

12:20 pm-12:11 am

2 stops17h 51m

Chicago O'Hare Intl

Wed 5/14

7:50 am-8:10 am

2 stops18h 20m

$544

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 4/24

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 4/28

10:37 am-11:35 am

1 stop18h 58m

$544

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Thu 5/8

2:00 pm-6:40 pm

2 stops34h 40m

Chicago O'Hare Intl

Wed 5/14

9:55 am-6:55 am

1 stop15h 00m

$545

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Fri 8/22

1:05 pm-6:15 pm

1 stop11h 10m

Chicago O'Hare Intl

Fri 9/5

10:15 pm-8:20 pm

1 stop16h 05m

$546

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 9/7

10:25 am-1:20 pm

1 stop32h 55m

Chicago O'Hare Intl

Fri 9/19

2:53 pm-9:40 am

1 stop12h 47m

$547

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 5/7

6:55 am-1:55 pm

1 stop13h 00m

Chicago O'Hare Intl

Mon 5/12

6:05 pm-8:20 am

Nonstop8h 15m

$548

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 9/17

6:50 am-2:50 pm

2 stops14h 00m

Chicago O'Hare Intl

Wed 9/24

3:40 pm-10:00 am

1 stop12h 20m

$551

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 5/4

6:00 am-12:10 pm

1 stop12h 10m

Chicago O'Hare Intl

Sun 5/11

11:10 am-6:55 am

1 stop13h 45m

$552

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Wed 4/30

6:35 pm-3:55 pm

1 stop27h 20m

Chicago O'Hare Intl

Thu 5/8

6:35 pm-5:50 pm

1 stop17h 15m

$554

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sat 4/26

12:15 pm-2:45 pm

Nonstop8h 30m

Chicago O'Hare Intl

Sun 5/4

8:20 pm-10:30 am

Nonstop8h 10m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy1 starTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on London-Chicago flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

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 round-trip flight from London to Chicago. Price data was last updated on April 11, 2025.

The best time to book flights from London to Chicago is 69 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 April 15, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% 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. Monday 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 April 15, 2025.

The most flights from LON to CHI are scheduled on a Saturday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (44 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 April 15, 2025.
Read reviews from past customers who have flown Delta, KLM and LOT 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
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,323 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,065 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
1,269 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very good
7,917 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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 $544, Finnair will fly you from London to Chicago and back. In addition to Finnair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Icelandair - these airlines can fly you to your destination from $544 and $545, respectively. Finnair is currently priced 23% below the average price you’ll pay for this route.

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

    $498 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Aer Lingus and WestJet, with prices starting from $503 and $505, 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: United Airlines (95%), Austrian Airlines (93%), Brussels Airlines( 93%).

  • What are the cheapest flights from London to Chicago?

    While on average a flight from London to Chicago is generally $2,246, our data shows the cheapest flight currently is $550. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $523 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?

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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
Heathrow to Midway flights
London City to O'Hare Intl flights
Edinburgh to O'Hare Intl flights
Manchester to O'Hare Intl flights
Stansted to O'Hare Intl flights
Heathrow to St. Louis flights
Birmingham to O'Hare Intl flights
Gatwick to St. Louis flights
Luton to O'Hare Intl flights
Birmingham to Midway flights
Liverpool to O'Hare Intl flights
Newcastle upon Tyne to O'Hare Intl flights
Bristol to O'Hare Intl flights
Leeds to O'Hare Intl flights
Southampton to O'Hare Intl flights
Manchester to St. Louis flights
Edinburgh to St. Louis flights
Exeter to O'Hare Intl flights
Birmingham to St. Louis flights
Liverpool to St. Louis flights
Newcastle upon Tyne to St. Louis flights
Norwich to O'Hare Intl flights
Heathrow to Evansville flights
Gatwick to Evansville flights
Leeds 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$575FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$677FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$557Average$799FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$562Average$845FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$574Average$731FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$777FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$588Average$792FlexibilityNo cancel feeOn-time71%
FinnairCheapest$613Average$838FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$1,030FlexibilityNo cancel feeOn-time76%

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