Cheapest return flights from Seattle to Helsinki in August from 446€

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

Return flights

13 Aug - 20 Aug Icelandair
22 Aug - 27 Aug Scandinavian Airlines
10 Aug - 20 Aug Aer Lingus
04 Aug - 20 Aug Scandinavian Airlines
16 Aug - 23 Aug Scandinavian Airlines
28 Aug - 04 Sep Finnair
04 Aug - 20 Aug Finnair direct
10 Aug - 20 Aug Finnair direct
13 Aug - 20 Aug Finnair direct
27 Aug - 03 Sep Alaska Airlines
26 Aug - 02 Sep Alaska Airlines
10 Aug - 17 Aug Finnair direct
11 Aug - 18 Aug Finnair direct
29 Aug - 05 Sep Finnair
31 Aug - 07 Sep Finnair
25 Aug - 01 Sep Finnair
30 Aug - 06 Sep Alaska Airlines

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

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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