Cheapest one-way flights from Seattle to Amsterdam in September from $410

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

One-Way flights

25 Sep Alaska Airlines
23 Sep Frontier Airlines
24 Sep Alaska Airlines
26 Sep Frontier Airlines
20 Sep Alaska Airlines
23 Sep Air France direct
24 Sep Air France direct
22 Sep Delta direct
21 Sep Delta direct
25 Sep Air France direct

Also check the deals for return 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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