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Results refresh when you open or revisit this page. Last snapshot: Jul 25, 2026.

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Cheapest one-way flights from Seattle (SEA) to Helsinki (HEL), September

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Dates, airline, and price
Dates	Airline	Price
16 Sep	Icelandair
24 Sep	Sun Country Airlines
05 Sep	Icelandair
25 Sep	Icelandair
25 Sep	American Airlines Direct Flight

deals for return flights from Seattle to Helsinki in September.

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Updated Jul 25, 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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Cheapest one-way flights from Seattle (SEA) to Helsinki (HEL), September

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