Cheapest return flights from Seattle to Helsinki in December from 591€

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

Return flights

02 Dec - 09 Dec Finnair
03 Dec - 10 Dec Finnair
09 Dec - 16 Dec Finnair
06 Dec - 13 Dec Finnair
08 Dec - 15 Dec Finnair
05 Dec - 12 Dec Finnair
11 Dec - 18 Dec Alaska Airlines
01 Dec - 08 Dec Finnair
16 Dec - 23 Dec Alaska Airlines
10 Dec - 17 Dec Alaska Airlines
25 Dec - 01 Jan Finnair
28 Dec - 04 Jan Finnair
27 Dec - 03 Jan Finnair
29 Dec - 05 Jan Finnair
26 Dec - 02 Jan Finnair

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

Skyscanner

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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