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

Return flights

31 Oct - 22 Nov	Icelandair
17 Oct - 08 Nov	Icelandair
23 Oct - 15 Nov	Icelandair
15 Oct - 08 Nov	Icelandair
26 Oct - 15 Nov	Icelandair
18 Oct - 08 Nov	Icelandair
28 Oct - 22 Nov	Icelandair
22 Oct - 15 Nov	Icelandair
19 Oct - 04 Nov	Icelandair
01 Oct - 04 Oct	Lufthansa
13 Oct - 17 Oct	Icelandair
19 Oct - 04 Nov	Delta	direct
17 Oct - 26 Oct	Icelandair
09 Oct - 20 Oct	Turkish Airlines
09 Oct - 19 Oct	Icelandair
02 Oct - 25 Oct	Turkish Airlines
01 Oct - 25 Oct	Icelandair
01 Oct - 03 Oct	WestJet
01 Oct - 02 Oct	Lufthansa
17 Oct - 26 Oct	Air France	direct

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

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 return flights from Seattle to Amsterdam in October from $609

Return flights