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Finnair flights from London to Chicago (LON - CHI)

LON — CHI
16 Jul — 23 Jul1
1 adult
1 adult, Economy, 0 bags

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Cheapest Finnair flights from London to Chicago
Explore the most affordable Finnair flight options available from London to Chicago. Find the lowest fares with prices last updated on 16 June 2026.

Tue 14/712:15
LHR
-
ORD
Nonstop8h 45m
Finnair
Sun 26/711:45
ORD
-
LHR
1 stop12h 35m
Finnair
Deal found 13/6£568
Wed 8/712:15
LHR
-
ORD
Nonstop8h 45m
Finnair
Wed 22/711:45
ORD
-
LHR
1 stop12h 30m
Finnair
Deal found 13/6£569
Wed 8/707:50
LHR
-
ORD
1 stop14h 10m
Finnair
Wed 15/711:45
ORD
-
LHR
1 stop16h 30m
Finnair
Deal found 13/6£570

  • How do most travelers feel about Finnair?

    Finnair has received a 7.7/10 rating from 1,410 Cheapflights user reviews. If you wish to plan your next trip from London to Chicago with Finnair, enter your preferred travel dates above!

  • Does Finnair service alternative airports for LON-CHI?

    If you’re flying LON-CHI on Finnair and are looking for alternative airports to fly into or out of, you are in luck. When arriving in Chicago, most people land at Chicago O'Hare Intl, but that is not the only available airport that Finnair flies to. Many people choose to land at Chicago Midway depending on where there are traveling to in the area. If you are looking for alternative departure airport to London Heathrow, consider flying out of London Gatwick which also offers Finnair flights.

  • Can I get a flight from London to Chicago on Finnair for under £671?

    There are 7 flights available on Finnair from London to Chicago for under £671. These prices can change based on many factors including date and time. To find LON-CHI flight prices for your dates, click here.

Finnair flights from London to Chicago in 2026

Find detailed information about Finnair flights from London to Chicago. Explore the options provided by Finnair to plan your journey from London to Chicago. Data last updated 16 June 2026.

One-way from

£447

Return from

£568

Popular in

July

Cheapest in

February

Average price (all airlines)

£657
Finnair
  • Finnair
  • 17/9
  • Nonstop
  • 9h 00m total
  • London to Chicago
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Finnair
  • Finnair
  • 14/7-26/7
  • 1 total stop
  • 21h 20m total
  • London to Chicago
Search Deals
Highest demand for flights from London to Chicago; 15% potential price increase.
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Best time to find cheap flights from London to Chicago; 2% potential price drop.
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Average price for all London to Chicago flights (one-way and round-trip).
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Which month is the cheapest to fly Economy class from London to Chicago?

For Economy class flights, the cheapest month to fly this route is September. The most expensive months are July and June.

Weekly Finnair flight availability from London to Chicago

The most Finnair flights from LON to CHI are scheduled on a Monday (5 on average). You will have fewer Finnair flight options on Monday, which is when the least amount of flights are scheduled (5 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 London to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from London 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

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Fly from London 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 16 June 2026.
British Airways flights from London to Chicago
Lufthansa flights from London 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 16 June 2026.
Finnair
7.7
Good
1,410 reviews
Check prices
Overview

Entertainment

6.9

Boarding

7.7

Crew

8.2

Food

6.7

Comfort

7.4

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