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

LHR — CHI
25 Jul — 1 Aug1
1 adult
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 25 June 2026.

Tue 14/714:45
LHR
-
ORD
Nonstop8h 50m
Finnair
Sun 19/711:45
ORD
-
LHR
1 stop16h 45m
Finnair
Deal found 25/6£576
Fri 10/709:15
LHR
-
ORD
1 stop13h 31m
Finnair
Tue 21/708:10
ORD
-
LHR
1 stop20h 05m
Finnair
Deal found 21/6£587
Thu 2/714:45
LHR
-
ORD
Nonstop8h 50m
Finnair
Tue 14/711:45
ORD
-
LHR
1 stop12h 30m
Finnair
Deal found 21/6£588

  • How do most travelers feel about Finnair?

    Finnair has received a 7.6/10 rating from 1,415 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 £758?

    Cheapflights currently has 6 LHR-CHI flights for under £758. 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

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 25 June 2026.

One-way from

£478

Return from

£576

Popular in

July

Cheapest in

September

Average price (all airlines)

£689
Finnair
  • Finnair
  • 20/9
  • Nonstop
  • 8h 50m total
  • London to Chicago
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Finnair
  • Finnair
  • 14/7-19/7
  • 1 total stop
  • 25h 35m total
  • London to Chicago
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Highest demand for flights from London Heathrow to Chicago; 12% potential price increase.
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Best time to find cheap flights from London Heathrow to Chicago; 1% potential price drop.
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Average price for all London Heathrow to Chicago flights (one-way and round-trip).
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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 May.

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 (4 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.
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.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 25 June 2026.
British Airways flights from London Heathrow to Chicago
Lufthansa flights from London Heathrow to Chicago

See what others are saying about Finnair

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 25 June 2026.
Finnair
7.6
Good
1,415 reviews
Check prices
Overview

Boarding

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Crew

8.2

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