AirHint found the following cheapest one-way flights from Seattle (SEA) to Helsinki (HEL) in October 2025 (see full year).
One-Way flights
| 26 Oct | Finnair | ||
| 28 Oct | Finnair | ||
| 21 Oct | Finnair | ||
| 22 Oct | Finnair | ||
| 29 Oct | Finnair | ||
| 27 Oct | Alaska Airlines | ||
| 25 Oct | jetBlue | ||
| 18 Oct | Alaska Airlines | ||
| 23 Oct | Alaska Airlines | ||
| 31 Oct | British Airways |
Also check the deals for return flights from Seattle to Helsinki in October.
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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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