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£404+ Cheap flights to Chicago

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
— CHI
23 Jul — 30 Jul1
1 adult

Flights to Chicago in 2025

Find the latest flights to Chicago in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 18 July 2025.

Return from

£417

One-way from

£404

Popular in

July

Cheapest in

February

Average price

£656

Good round-trip deal

£547 or less

Good one-way deal

£607 or less
Icelandair
  • Icelandair
  • 15/8-23/8
  • 2 total stops
  • 21h 55m total
  • London to Chicago
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Aer Lingus
  • Aer Lingus
  • 23/8
  • 1 total stop
  • 17h 20m total
  • London to Chicago
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Highest demand for flights based on searches. 14% potential increase in price (£66 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
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Average for return flights in July 2025
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Price to beat on a round-trip flight from London to Chicago.
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Price to beat on a one-way flight from London to Chicago.
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Find flight deals to Chicago

Cheapest flights to Chicago
Explore the most affordable flight options available to Chicago. Find the lowest fares based on data from user searches, with prices last updated on 18 July 2025.

Fri 15/815:40LGW - ORD
1 stop11h 35mIcelandair
Sat 23/819:25ORD - LGW
1 stop10h 20mIcelandair
Deal found 17/7£417
Mon 25/821:25LHR - ORD
1 stop26h 50mIcelandair
Wed 1/1019:25ORD - LHR
1 stop10h 30mIcelandair
Deal found 15/7£417
Tue 19/820:45LGW - ORD
3 stops27h 05mMultiple Airlines
Sat 23/820:12ORD - LGW
2 stops28h 08mMultiple Airlines
Deal found 16/7£418
Tue 9/909:50LHR - ORD
1 stop11h 55mFinnair
Mon 29/907:10ORD - LHR
2 stops17h 10mFinnair
Deal found 16/7£418
Thu 6/1108:55LHR - ORD
1 stop13h 20mMultiple Airlines
Wed 12/1117:50ORD - LHR
Nonstop8h 05mMultiple Airlines
Deal found 17/7£419
Tue 16/912:15STN - ORD
1 stop12h 45mMultiple Airlines
Tue 30/921:15ORD - STN
1 stop13h 20mMultiple Airlines
Deal found 16/7£419
Sun 7/919:30LHR - ORD
1 stop23h 50mAustrian Airlines
Tue 16/912:50ORD - LHR
1 stop15h 50mAustrian Airlines
Deal found 18/7£421
Mon 1/909:00LTN - ORD
1 stop16h 00mMultiple Airlines
Mon 8/921:15ORD - LTN
1 stop12h 45mMultiple Airlines
Deal found 18/7£421
Mon 20/1007:05LHR - ORD
2 stops39h 05mScandinavian Airlines
Sat 1/1120:20ORD - LHR
1 stop20h 20mScandinavian Airlines
Deal found 17/7£424
Thu 11/915:30LHR - ORD
Nonstop8h 45mBritish Airways
Mon 15/922:35ORD - LHR
Nonstop7h 40mBritish Airways
Deal found 17/7£425
Tue 25/1115:45LHR - MDW
2 stops32h 51mVirgin Atlantic
Tue 2/1214:00MDW - LHR
1 stop16h 15mVirgin Atlantic
Deal found 16/7£426
Mon 27/1011:10LHR - ORD
1 stop33h 00mUnited Airlines
Sat 8/1117:50ORD - LHR
Nonstop8h 05mUnited Airlines
Deal found 18/7£429

Cheapflights Fare Finder

Locate flights to Chicago that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 18 July 2025.
Use the filters below to find and compare flights to Chicago that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Fri 15/8

15:40-21:15

1 stop11h 35m

Chicago O'Hare Intl

Sat 23/8

19:25-11:45

1 stop10h 20m

£417

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 25/8

21:25-18:15

1 stop26h 50m

Chicago O'Hare Intl

Wed 1/10

19:25-11:55

1 stop10h 30m

£417

LondonChicago

LGW - ORD

LGWORD

London Gatwick

Tue 19/8

20:45-17:50

3 stops27h 05m

Chicago O'Hare Intl

Sat 23/8

20:12-06:20

2 stops28h 08m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Tue 9/9

09:50-15:45

1 stop11h 55m

Chicago O'Hare Intl

Fri 19/9

06:05-06:20

2 stops18h 15m

£418

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 6/11

08:55-16:15

1 stop13h 20m

Chicago O'Hare Intl

Wed 12/11

17:50-07:55

Nonstop8h 05m

£419

LondonChicago

STN - ORD

STNORD

London Stansted

Tue 16/9

12:15-19:00

1 stop12h 45m

Chicago O'Hare Intl

Tue 30/9

21:15-16:35

1 stop13h 20m

£419

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Sun 7/9

09:05-13:20

1 stop34h 15m

Chicago O'Hare Intl

Mon 15/9

12:50-06:55

1 stop12h 05m

£421

LondonChicago

LTN - ORD

LTNORD

London Luton

Mon 1/9

09:00-19:00

1 stop16h 00m

Chicago O'Hare Intl

Mon 8/9

21:15-16:00

1 stop12h 45m

£421

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Mon 20/10

07:05-16:10

2 stops39h 05m

Chicago O'Hare Intl

Sat 1/11

20:20-21:40

1 stop20h 20m

£424

LondonChicago

LHR - ORD

LHRORD

London Heathrow

Thu 11/9

15:30-18:15

Nonstop8h 45m

Chicago O'Hare Intl

Mon 15/9

22:35-12:15

Nonstop7h 40m

£425

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 55 results
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Best time to book a flight to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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 to Chicago

When is the best time to book a flight 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 July 2025.

The best time to book flights 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.

How long is the flight to Chicago?

On average, a flight from London to Chicago takes 13 hours 13 minutes. Flights to Chicago from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

When is the cheapest time to fly to Chicago?

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

Users looking for the lowest fares to Chicago should consider flying on Thursday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday at midday, when prices are usually at their highest.

Weekly flight availability to Chicago

The most flights from London to Chicago 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 (48 on average).

What are the most popular airlines that fly to Chicago?

The most popular airlines flying from London to Chicago are British Airways, Lufthansa and Finnair.

British Airways
British Airways
From £396
Aer Lingus
Aer Lingus
From £439
Lufthansa
Lufthansa
From £534
Icelandair
Icelandair
From £417

What are the cheapest airlines that fly to Chicago?

The cheapest airlines flying from London to Chicago are Icelandair, Scandinavian Airlines and TAP AIR PORTUGAL.

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 July 2025.
Read through reviews of airlines serving the United States, such as Delta, KLM, andAir Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,958 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,374 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Transat
7.7
Good
416 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
816 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very Good
7,958 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

FAQs about flying to Chicago

  • Can I find cheaper flights to Chicago if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Chicago on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Chicago?

    Based on reviews from Cheapflights users, Icelandair is rated the highest out of the airlines that fly to Chicago.

  • What is the cheapest airport to fly to in Chicago?

    Chicago O'Hare Intl is currently the cheapest airport to fly to in Chicago. One-way flights to Chicago O'Hare Intl typically cost £37, while return flights cost around £33.

  • How much is a return flight to Chicago?

    A return flight to Chicago will typically cost around £288, however they can be found for as little as £44.

  • Where does the fastest flight to Chicago depart from?

    For those looking to save time traveling to Chicago, London offers the quickest one-way flight (8 hours 25 minutes).

  • Which airport is closest to National Museum of Mexican Art?

    f being close to National Museum of Mexican Art is important to you, you’ll want to land at Chicago O'Hare Intl Airport.

  • Does Chicago O'Hare Intl have car hire?

    Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Chicago O'Hare Intl?

    Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 mi away from Chicago O'Hare Intl).

See more FAQs

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