Cheapest return flights from Seattle (SEA) to Helsinki (HEL), December

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
08 Dec 15 Dec Alaska Airlines
02 Dec 09 Dec Finnair
07 Dec 14 Dec Finnair
06 Dec 13 Dec Finnair
14 Dec 21 Dec Finnair
01 Dec 08 Dec Alaska Airlines
10 Dec 17 Dec Finnair
12 Dec 19 Dec Finnair
13 Dec 20 Dec Finnair
04 Dec 11 Dec Alaska Airlines
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deals for one-way flights from Seattle to Helsinki in December.

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Updated Jun 18, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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