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$523+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
LON — CHI
May 17 — May 241
Sat 5/17
Sat 5/24
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”

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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 64 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

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 May 12, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$569
(Expedia)

One-way from

$523
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$690

Good round-trip deal

$699 or less

Good one-way deal

$674 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 ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 12, 2025.

This Expedia deal was found by Cheapflights users on 5/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:40 pmLGW - ORD
2 stops23h 25mSWISS
Tue 9/238:20 pmORD - LGW
2 stops15h 30mSWISS
Deal found 5/11$569
This Gotogate deal was found by Cheapflights users on 5/12. 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 6/179:25 pmLHR - ORD
1 stop26h 50mIcelandair
Sun 6/2210:15 pmORD - LHR
1 stop31h 40mIcelandair
Deal found 5/12$569
This oojo deal was found by Cheapflights users on 5/12. 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.
Sun 6/83:40 pmLGW - ORD
1 stop32h 35mIcelandair
Thu 12/116:30 pmORD - LGW
1 stop10h 25mIcelandair
Deal found 5/12$570
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Wed 9/178:45 amLCY - ORD
2 stops15h 40mMultiple Airlines
Thu 10/27:05 pmORD - LCY
1 stop11h 25mMultiple Airlines
Deal found 5/12$570
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/289:15 amLHR - ORD
Nonstop8h 30mBritish Airways
Tue 9/164:55 pmORD - LHR
Nonstop7h 55mBritish Airways
Deal found 5/12$570
This SWISS deal was found by Cheapflights users on 5/11. 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 9/118:40 amLHR - ORD
1 stop13h 15mSWISS
Mon 9/152:53 pmORD - LHR
2 stops19h 32mSWISS
Deal found 5/11$571
This TravelUp deal was found by Cheapflights users on 5/12. 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.
Wed 5/217:25 amLHR - ORD
1 stop12h 30mMultiple Airlines
Wed 6/41:04 pmORD - LHR
1 stop11h 51mMultiple Airlines
Deal found 5/12$572
This SWISS deal was found by Cheapflights users on 5/11. 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 11/69:25 amLCY - ORD
1 stop12h 50mSWISS
Tue 11/117:05 pmORD - LCY
1 stop11h 45mSWISS
Deal found 5/11$575
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/226:15 amLHR - ORD
1 stop18h 35mAmerican Airlines
Mon 5/268:11 amORD - LHR
1 stop20h 04mAmerican Airlines
Deal found 5/11$577
This TravelUp deal was found by Cheapflights users on 5/12. 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 11/112:30 pmLHR - MDW
1 stop14h 14mAir France
Fri 11/141:05 pmMDW - LHR
1 stop11h 20mAir France
Deal found 5/12$577
This Mytrip deal was found by Cheapflights users on 5/12. 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.
Tue 6/31:40 pmLGW - ORD
2 stops22h 52mMultiple Airlines
Thu 7/2410:15 pmORD - LGW
1 stop10h 25mMultiple Airlines
Deal found 5/12$578
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/278:40 amLHR - ORD
1 stop11h 30mDelta
Sun 12/2112:00 pmORD - LHR
1 stop13h 20mDelta
Deal found 5/12$580

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 May 12, 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

Thu 9/18

6:40 pm-12:05 pm

2 stops23h 25m

Chicago O'Hare Intl

Tue 9/23

8:20 pm-5:50 pm

2 stops15h 30m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 6/17

9:25 pm-6:15 pm

1 stop26h 50m

Chicago O'Hare Intl

Sun 6/22

10:15 pm-11:55 am

1 stop31h 40m

$569

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Wed 5/28

9:15 am-11:45 am

Nonstop8h 30m

Chicago O'Hare Intl

Tue 9/16

4:55 pm-6:50 am

Nonstop7h 55m

$570

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Sun 6/8

3:40 pm-6:15 pm

1 stop32h 35m

Chicago O'Hare Intl

Thu 12/11

6:30 pm-10:55 am

1 stop10h 25m

$570

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 9/11

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 9/15

2:53 pm-4:25 pm

2 stops19h 32m

$571

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/22

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 5/26

6:05 pm-8:20 am

Nonstop8h 15m

$575

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/22

6:15 am-6:50 pm

1 stop18h 35m

Chicago O'Hare Intl

Mon 5/26

8:11 am-10:15 am

1 stop20h 04m

$577

LondonChicago

LHR - MDW

LHRMDW

London Heathrow

Sat 11/1

12:30 pm-9:44 pm

1 stop14h 14m

Chicago Midway

Fri 11/14

1:05 pm-6:25 am

1 stop11h 20m

$577

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 5/22

9:00 am-6:15 pm

1 stop15h 15m

Chicago O'Hare Intl

Tue 5/27

4:05 pm-6:20 am

Nonstop8h 15m

$578

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 6/3

1:40 pm-6:32 am

2 stops22h 52m

Chicago O'Hare Intl

Thu 7/24

10:15 pm-2:40 pm

1 stop10h 25m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy-Trust 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 May 9, 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 May 12, 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 May 12, 2025.

The most flights from LON to CHI are scheduled on a Monday (53 on average). You will have fewer flight options on Thursday, 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 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 May 12, 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
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,342 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Transat
7.8
Good
387 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LOT
7.6
Good
1,071 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
788 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $569, SWISS will fly you from London to Chicago and back. In addition to SWISS, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Icelandair and British Airways - these airlines can fly you to your destination from $569 and $570, respectively. SWISS is currently priced 19% below the average price you’ll pay for this route.

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

    $526 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 Lufthansa and Aer Lingus, with prices starting from $528 and $537, 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 (92%), 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 $2,289, our data shows the cheapest flight currently is $562. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay $456 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
Stansted to O'Hare Intl flights
Luton to O'Hare Intl flights
Manchester to O'Hare Intl flights
Gatwick to St. Louis flights
Heathrow to St. Louis flights
Edinburgh to O'Hare Intl flights
Birmingham to O'Hare Intl flights
Birmingham to Midway flights
Newcastle upon Tyne to O'Hare Intl flights
Manchester to St. Louis flights
Leeds to O'Hare Intl flights
Southampton to O'Hare Intl flights
Bristol to O'Hare Intl flights
Edinburgh to St. Louis flights
Heathrow to Evansville flights
Birmingham to St. Louis flights
Exeter to O'Hare Intl flights
Gatwick to Evansville flights
Norwich to O'Hare Intl flights
Liverpool to St. Louis flights
Liverpool to O'Hare Intl flights
Leeds to St. Louis flights
Newcastle upon Tyne 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 May 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$451Average$585FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$462Average$569FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$483Average$677FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$551Average$797FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$562Average$846FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$568Average$713FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$775FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$583Average$800FlexibilityNo cancel feeOn-time71%
FinnairCheapest$613Average$852FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$660Average$922FlexibilityNo cancel feeOn-time76%

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