Cheapest return flights from Seattle to Zurich in September from 362€

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

Return flights

24 Sep - 18 Oct Scandinavian Airlines
26 Sep - 18 Oct Scandinavian Airlines
15 Sep - 10 Oct Delta
14 Sep - 22 Sep Lufthansa
14 Sep - 20 Sep Lufthansa
30 Sep - 07 Oct Icelandair
09 Sep - 04 Oct United
12 Sep - 04 Oct United
28 Sep - 05 Oct Icelandair

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

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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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