£388+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
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 5 July 2025.
Find flight deals to Chicago
Cheapest flights to ChicagoExplore the most affordable flight options available to Chicago. Find the lowest fares based on data from user searches, with prices last updated on 5 July 2025.
Explore the most affordable flight options available to Chicago. Find the lowest fares based on data from user searches, with prices last updated on 5 July 2025.
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 5 July 2025.
Use the filters below to find and compare flights to Chicago that are best for you.
Fly from
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 28/8
16:35-16:10
1 stop29h 35m
Chicago O'Hare Intl
Thu 4/9
18:00-12:45
1 stop12h 45m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Thu 25/9
14:50-16:30
1 stop31h 40m
Chicago O'Hare Intl
Mon 29/9
18:10-09:45
1 stop33h 35m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 13/9
19:30-13:20
1 stop23h 50m
Chicago O'Hare Intl
Mon 22/9
21:25-11:45
Nonstop8h 20m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Fri 31/10
11:55-18:20
1 stop11h 25m
Chicago O'Hare Intl
Sat 8/11
18:30-10:55
1 stop10h 25m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Tue 18/11
06:30-13:10
1 stop12h 40m
Chicago O'Hare Intl
Tue 25/11
15:45-05:55
Nonstop8h 10m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 8/9
09:50-15:45
1 stop11h 55m
Chicago O'Hare Intl
Thu 18/9
21:15-11:05
Nonstop7h 50m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Fri 10/10
14:00-18:43
1 stop34h 43m
Chicago O'Hare Intl
Wed 15/10
19:39-10:00
1 stop32h 21m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 10/9
08:40-15:55
1 stop13h 15m
Chicago O'Hare Intl
Mon 15/9
15:45-21:45
1 stop24h 00m
LondonChicago
LGW - ORD
LGWORD
London Gatwick
Tue 11/11
18:40-16:15
1 stop27h 35m
Chicago O'Hare Intl
Sun 30/11
19:05-17:50
1 stop16h 45m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sun 24/8
06:30-14:55
1 stop14h 25m
Chicago O'Hare Intl
Tue 9/9
18:00-08:20
Nonstop8h 20m
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.
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 27 June 2025.
The best time to book flights to Chicago is 44 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 15 hours 5 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 Saturday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (40 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.
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 5 July 2025.
Read through reviews of airlines serving the United States, such as Delta, KLM, andAustrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
Crew
Overall
Comfort
Food
Boarding
Entertainment
Reviews
Kim,May 2025
PIH - SLC
FAQs about flying to Chicago
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Deals for Chicago flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets 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.
Can Cheapflights find flights to Chicago with no change fees?
Need flexible booking options for your flight to Chicago ? 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 to Chicago become cheaper?
Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Chicago today and book when you’re ready!