Finnair flights from London Heathrow Airport to Chicago (LHR - CHI)
LHR — CHI
15 Oct — 22 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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Cheapest Finnair flights from Heathrow to Chicago
Explore the most affordable Finnair flight options available from Heathrow to Chicago. Find the lowest fares with prices last updated on 15 September 2026.
Mon 28/909:45 -
Nonstop8h 40m
Sat 3/1013:35 -
1 stop26h 05m
Deal found 14/9£589
Wed 7/1011:10 -
Nonstop8h 40m
Wed 21/1022:30 -
Nonstop7h 45m
Deal found 14/9£595
Thu 8/1015:00 -
1 stop15h 08m
Tue 13/1022:30 -
Nonstop7h 45m
Deal found 12/9£599
Best Finnair flights from Heathrow to Chicago
Discover carefully curated Finnair flight deals from Heathrow to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 September 2026.
Fri 9/1015:35 -
1 stop12h 10m
Mon 12/1021:15 -
Nonstop8h 00m
Deal found 11/9£599
Sun 28/211:00 -
Nonstop8h 45m
Fri 19/322:50 -
Nonstop7h 45m
Deal found 10/9£603
Tue 24/1110:20 -
2 stops18h 17m
Tue 1/1216:17 -
1 stop10h 58m
Deal found 14/9£605
Direct Finnair flights from Heathrow to Chicago
Explore direct Finnair flight options from Heathrow to Chicago based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 September 2026.
Mon 2/1116:30 -
Nonstop9h 00m
Mon 16/1121:50 -
Nonstop7h 45m
Deal found 12/9£551
Sat 7/1111:00 -
Nonstop8h 45m
Sat 14/1117:10 -
Nonstop7h 45m
Deal found 14/9£577
Wed 7/1011:10 -
Nonstop8h 40m
Wed 21/1022:30 -
Nonstop7h 45m
Deal found 14/9£595
Last-minute Finnair flights from Heathrow to Chicago
Discover last-minute Finnair flight deals from Heathrow to Chicago. Data last updated 15 September 2026 and is based on user searches.
Mon 28/909:45 -
Nonstop8h 40m
Sat 3/1013:35 -
1 stop26h 05m
Deal found 14/9£589
Wed 7/1011:10 -
Nonstop8h 40m
Wed 21/1022:30 -
Nonstop7h 45m
Deal found 14/9£595
Thu 8/1015:00 -
1 stop15h 08m
Tue 13/1022:30 -
Nonstop7h 45m
Deal found 12/9£599
One-way Finnair flights to Chicago
Search for one-way Finnair flight options to Chicago. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.
Thu 1/1009:45 -
Nonstop8h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 13/9£570
Fri 25/909:45 -
Nonstop8h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£570
Mon 5/1009:45 -
Nonstop8h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£571
How do most travelers feel about Finnair?
Finnair has received a 7.6/10 rating from 1,429 Cheapflights user reviews. If you wish to plan your next trip from London Heathrow Airport to Chicago with Finnair, enter your preferred travel dates above!
Can I get a flight from London Heathrow Airport to Chicago on Finnair for under £667?
Cheapflights currently has 5 LHR-CHI flights for under £667. Flights to Chicago will vary based on many factors, like date and time. Click here to find the best price for your dates on Cheapflights.
Find detailed information about Finnair flights from Heathrow to Chicago. Explore the options provided by Finnair to plan your journey from Heathrow to Chicago. Data last updated 15 September 2026.
Which month is the cheapest to fly Economy class from London Heathrow Airport to Chicago?
For Economy class flights, the cheapest month to fly this route is February. The most expensive months are July and August.
Weekly Finnair flight availability from London Heathrow Airport to Chicago
The most Finnair flights from LHR to CHI are scheduled on a Monday (5 on average). You will have fewer Finnair flight options on Saturday, which is when the least amount of flights are scheduled (3 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 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).
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.
LHR-CHI
LHR-ORD
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.
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Fly from Heathrow to Chicago on another airline
Consider alternative airlines that service the Chicago area. Flight routes are based on user searches made on Cheapflights and were last updated on 15 September 2026.
Browse through other Finnair flights departing from Heathrow. Flight routes are based on user searches made on Cheapflights and were last updated on 15 September 2026.
If Chicago is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on 15 September 2026.
Browse through some of the most popular routes that Finnair offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 15 September 2026.
Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 15 September 2026.
The flight from Helsinki to Toronto was very cramped. No leg space and no room to even walk. Very bad experience
8.0
Very Good|Jul 2026
Very limited food provided. Limited drinks, lights out for 10 of 12.30 flights. Very few staff.
2.0
Poor|Jun 2026
Lost our luggage and took two days to get it back. Ruined the trip.
10.0
Wonderful|Jun 2026
Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
10.0
Wonderful|May 2026
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