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

One-Way flights

30 Aug	WestJet
07 Aug	jetBlue
17 Aug	jetBlue
28 Aug	Alaska Airlines
23 Aug	Air France	direct
11 Aug	Delta	direct
17 Aug	Air France	direct
07 Aug	Air France	direct
01 Aug	Delta	direct
30 Aug	Delta	direct

Also check the deals for return flights from Seattle to Amsterdam 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 one-way flights from Seattle to Amsterdam in August from $364

One-Way flights