AirHint found the following cheapest return flights from Seattle (SEA) to Helsinki (HEL) in November 2025 (see full year).

Return flights

03 Nov - 10 Nov	Icelandair
13 Nov - 22 Nov	Icelandair
15 Nov - 22 Nov	Icelandair
04 Nov - 10 Nov	Icelandair
01 Nov - 08 Nov	Icelandair
11 Nov - 18 Nov	Finnair
04 Nov - 11 Nov	Finnair
18 Nov - 25 Nov	Finnair
05 Nov - 12 Nov	Finnair
12 Nov - 19 Nov	Finnair
25 Nov - 02 Dec	Alaska Airlines
28 Nov - 05 Dec	British Airways
26 Nov - 03 Dec	Alaska Airlines
30 Nov - 07 Dec	Finnair
27 Nov - 04 Dec	Finnair
29 Nov - 06 Dec	Finnair
24 Nov - 01 Dec	Finnair

Also check the deals for one-way flights from Seattle to Helsinki in November.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seattle to Helsinki in November from 424€

Return flights