Flights
Insights
FAQs

Finnair flights from London Heathrow Airport to Chicago (LHR - CHI)

LHR — CHI
1 Oct — 8 Oct1
1 adult
1 adult, Economy, 0 bags

Find Finnair flight deals from Heathrow to Chicago

Enter your travel dates to find the best prices.

Cheapest Finnair flights from Heathrow to Chicago

Sat 5/909:45 -
Nonstop8h 45m
Fri 18/920:50 -
Nonstop8h 00m
Deal found 29/8£553
Fri 4/912:15 -
Nonstop8h 45m
Thu 17/920:50 -
Nonstop8h 00m
Deal found 28/8£556
Thu 3/912:15 -
Nonstop8h 45m
Sat 19/920:50 -
Nonstop8h 00m
Deal found 27/8£557

  • How do most travelers feel about Finnair?

    Finnair has received a 7.6/10 rating from 1,430 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 £591?

    Cheapflights currently has 4 LHR-CHI flights for under £591. 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.

Finnair flights from Heathrow to Chicago in 2026

One-way from

£461

Return from

£532

Popular in

August

Cheapest in

February

Average price (all airlines)

£588
Finnair
  • Finnair
  • 30/10
  • Nonstop
  • 8h 45m total
  • London to Chicago
Search Deals
Finnair
  • Finnair
  • 21/11-28/11
  • 2 total stops
  • 27h 40m total
  • London to Chicago
Search Deals
Highest demand for flights from London Heathrow to Chicago; 13% potential price increase.
Search Deals
Best time to find cheap flights from London Heathrow to Chicago; 2% potential price drop.
Search Deals
Average price for all London Heathrow to Chicago flights (one-way and round-trip).
Search Deals

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 Tuesday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Chicago 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

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.
Estimated return price

Browse thousands of different options on Cheapflights for your next trip

Fly from Heathrow to Chicago on another airline

British Airways flights from London Heathrow to Chicago
Lufthansa flights from London Heathrow to Chicago

See what others are saying about Finnair

Finnair
7.6
Good
1,430 reviews
Check prices
Overview

Crew

8.2

Comfort

7.4

Food

6.7

Boarding

7.7

Entertainment

6.9

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.