Cheapest return flights from Seattle to Amsterdam in September from 455€

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

Return flights

01 Sep - 11 Sep Aer Lingus
02 Sep - 10 Sep Aer Lingus
01 Sep - 17 Sep Aer Lingus
01 Sep - 16 Sep Aer Lingus
02 Sep - 16 Sep Aer Lingus
09 Sep - 16 Sep Aer Lingus
08 Sep - 15 Sep Air Canada
16 Sep - 15 Oct Aer Lingus
04 Sep - 08 Sep Icelandair
22 Sep - 30 Sep Aer Lingus
18 Sep - 22 Sep Aer Lingus
20 Sep - 03 Oct Icelandair
16 Sep - 15 Oct Air France direct
20 Sep - 03 Oct Virgin Atlantic direct

Also check the deals for one-way flights from Seattle to Amsterdam 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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