Cheap flights from London Heathrow Airport to Chicago from £394
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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London Heathrow to Chicago are usually found in February or March, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from Heathrow to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 11 July 2025.
Round-trip from | £408 |
---|---|
One-way from | £394 |
Popular in | August |
Cheapest in | February |
Average price | £632 |
Good round-trip deal | £541 or less |
Good one-way deal | £598 or less |
Find flight deals from Heathrow to Chicago
Cheapest flights from Heathrow to ChicagoExplore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Explore the most affordable flight options available from Heathrow to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow 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 858,174 searches. Data last updated 11 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chicago that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 1/12
19:50-16:45
2 stops50h 55m
Chicago O'Hare Intl
Wed 14/1
19:20-16:00
1 stop14h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sun 24/8
18:45-16:40
1 stop27h 55m
Chicago O'Hare Intl
Sun 31/8
18:00-17:45
1 stop17h 45m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 6/9
08:30-14:55
1 stop12h 25m
Chicago O'Hare Intl
Sat 13/9
21:25-11:45
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sat 6/9
21:25-21:15
1 stop29h 50m
Chicago O'Hare Intl
Fri 12/9
22:15-20:20
1 stop16h 05m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 18/9
09:50-15:45
1 stop11h 55m
Chicago O'Hare Intl
Tue 30/9
16:55-06:50
Nonstop7h 55m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 10/9
08:40-15:55
1 stop13h 15m
Chicago O'Hare Intl
Sun 21/9
16:00-06:20
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Mon 8/9
06:00-15:55
1 stop15h 55m
Chicago O'Hare Intl
Mon 15/9
19:05-17:50
1 stop16h 45m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Wed 10/9
09:05-13:20
1 stop34h 15m
Chicago O'Hare Intl
Wed 17/9
18:00-08:20
Nonstop8h 20m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Thu 25/9
06:50-14:55
2 stops14h 05m
Chicago O'Hare Intl
Mon 29/9
10:50-06:30
1 stop13h 40m
LondonChicago
LHR - ORD
LHRORD
London Heathrow
Sun 17/8
11:55-11:19
1 stop29h 24m
Chicago O'Hare Intl
Fri 22/8
06:15-20:45
1 stop32h 30m
Best time to book a flight from Heathrow to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Chicago
How far ahead should I book a flight from London Heathrow Airport to Chicago?
Use this chart to determine the optimal time to book a return flight from Heathrow to Chicago. Price data was last updated on 27 June 2025.
Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from London Heathrow Airport to Chicago?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago (average of £595). Flying from London Heathrow Airport to Chicago in July is currently the most expensive (average of £843). 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 LHR to CHI?
Find hourly flight availability from Heathrow 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 11 July 2025.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Chicago in the evening. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the afternoon.
What is the cheapest day to fly from London Heathrow Airport to Chicago?
Use this chart to determine the cheapest time to fly return from Heathrow to Chicago. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their London Heathrow Airport to Chicago flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from London Heathrow Airport to Chicago
Explore weekly flight availability from Heathrow 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 11 July 2025.
The most flights from LHR to CHI 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).
How much does it cost for a return flight from London Heathrow Airport to Chicago?
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 11 July 2025.
See what other customers who have flown with Delta, KLM, andAustrian Airlines from London Heathrow Airport to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Overall
Boarding
Comfort
Food
Crew
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Fly from Heathrow to Chicago on these airlines
Choose from the following airlines for your flight from Heathrow to Chicago. Flights are based on user searches made on Cheapflights and were last updated on 11 July 2025.
Top 10 airlines flying from Heathrow to Chicago
Discover the top 10 airlines that operate flights from Heathrow 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 858,174 searches. Data last updated 11 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Chicago?
Cheapflights makes it easy to find Heathrow to Chicago flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chicago?
Cheapflights helps you find that perfect flight to Chicago from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Heathrow to Chicago with no change fees?
Certainly. Search results for flights to Chicago from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Heathrow to Chicago become cheaper?
Yes, Cheapflights offers price alerts on Heathrow to Chicago flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.