AirHint found the following cheapest return flights from Seattle (SEA) to Zurich (ZRH) in August 2026 (see full year).

Return flights

15 Aug - 29 Aug	Scandinavian Airlines
15 Aug - 30 Aug	Scandinavian Airlines
14 Aug - 29 Aug	Scandinavian Airlines
07 Aug - 17 Aug	Finnair
07 Aug - 21 Aug	Delta
01 Aug - 08 Aug	Lufthansa
05 Aug - 12 Aug	Icelandair
07 Aug - 08 Aug	Condor

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

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 August from 561€

Return flights