AirHint found the following cheapest return flights from Seattle (SEA) to Zurich (ZRH) in October 2025 (see full year).

Return flights

15 Oct - 19 Oct	Scandinavian Airlines
14 Oct - 30 Oct	Icelandair
07 Oct - 14 Oct	Icelandair
22 Oct - 29 Oct	United
27 Oct - 03 Nov	United
17 Oct - 24 Oct	United
12 Oct - 19 Oct	United
02 Oct - 09 Oct	United

Also check the deals for one-way flights from Seattle to Zurich in October.

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 Zurich in October from $455

Return flights