Cheapest return flights from Seattle to Geneva in September from $523

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

Return flights

15 Sep - 23 Sep SWISS
12 Sep - 24 Sep Delta
12 Sep - 25 Sep Delta
27 Sep - 09 Oct Air Canada
12 Sep - 27 Sep Delta
12 Sep - 28 Sep United
27 Sep - 04 Oct Air Canada
10 Sep - 17 Sep Air Canada
19 Sep - 11 Oct United
09 Sep - 23 Sep Air Canada
11 Sep - 14 Sep Scandinavian Airlines

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

Skyscanner

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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