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Find cheap Finnair flights to Seattle

CMH — SEA
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest Finnair flights from United Kingdom to Seattle
Explore the most affordable Finnair flight options available from United Kingdom to Seattle. Find the lowest fares with prices last updated on 27 July 2026.

Mon 31/810:20
LHR
-
SEA
1 stop13h 40m
Finnair
Thu 10/920:20
SEA
-
LHR
Nonstop9h 25m
Finnair
Deal found 23/7£535
Mon 31/810:20
LHR
-
SEA
1 stop13h 40m
Finnair
Wed 16/913:30
SEA
-
LHR
Nonstop9h 15m
Finnair
Deal found 26/7£548
Sat 22/809:15
LHR
-
SEA
1 stop17h 33m
Finnair
Tue 8/920:20
SEA
-
LHR
Nonstop9h 25m
Finnair
Deal found 24/7£554

Flights to Seattle with Finnair at a glance

Find detailed information about Finnair flights from United Kingdom to Seattle. Explore the options provided by Finnair to plan your journey from United Kingdom to Seattle. Data last updated 27 July 2026.

Popular in

October

Cheapest in

June

Average price

£662

Return from

£503

One-way from

£415
Highest demand for flights to Seattle with Finnair; 7% potential price increase.
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Best time to find cheap flights to Seattle with Finnair; 4% potential price drop.
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Average price for flights to Seattle with Finnair (return).
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Finnair
  • Finnair
  • 4/9-19/9
  • 2 total stops
  • 29h 40m total
  • United Kingdom to Seattle
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Finnair
  • Finnair
  • 26/12
  • 1 total stop
  • 37h 49m total
  • United Kingdom to Seattle
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Cheapflights Insights

Find cheap Finnair flights to Seattle

How long is the flight to Seattle with Finnair?

On average, Finnair flights from the United Kingdom to Seattle take 12 hours 7 minutes. Flights to Seattle from other popular cities in the United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

Finnair weekly flight availability to Seattle

The most flights to Seattle operated by Finnair are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

FAQs about flights to Seattle with Finnair

  • Which airport do Finnair flights arrive at when travelling to Seattle?

    Finnair flights on this route tend to land at Seattle/Tacoma Intl Airport.

  • Is Finnair the cheapest airline for a flight to Seattle?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average return price for flights to Seattle tends to be with Air Canada.

  • Are there alternative airlines other than Finnair that fly to Seattle?

    Virgin Atlantic, British Airways and Icelandair all fly to Seattle and offer an alternative to Finnair.

  • How much is a Finnair flight to Seattle?

    The average price for a return flight with Finnair is £647, while a one-way flight costs around £581.

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Reviews of Finnair

See what Cheapflights users have to say about their Finnair experience.
Finnair
7.6
Good
1,427 reviews
Check prices
Overview

Crew

8.2

Boarding

7.7

Comfort

7.4

Entertainment

6.9

Food

6.7

Popular Finnair flights

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Fly your favourite airline to Seattle/Tacoma Intl

Fly your favorite airline to Seattle/Tacoma Intl. Flight routes are based on user searches made on Cheapflights and were last updated on 27 July 2026.
Finnair flights from Heathrow to Seattle
Finnair flights from London to Seattle