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

Return flights

31 Jul - 07 Aug	Finnair	direct
19 Jul - 26 Jul	Finnair	direct
27 Jul - 03 Aug	Finnair	direct
14 Jul - 21 Jul	Finnair	direct
21 Jul - 28 Jul	Finnair	direct
04 Jul - 17 Jul	Icelandair
26 Jul - 02 Aug	Finnair	direct
28 Jul - 04 Aug	Finnair	direct
30 Jul - 06 Aug	Finnair
09 Jul - 16 Jul	Finnair	direct
24 Jul - 31 Jul	Finnair
23 Jul - 30 Jul	Finnair
17 Jul - 24 Jul	Finnair
06 Jul - 13 Jul	Finnair	direct
29 Jul - 05 Aug	Finnair
18 Jul - 25 Jul	Finnair
25 Jul - 01 Aug	Finnair

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

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 July from 900€

Return flights