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

Return flights

22 Oct - 05 Nov	Icelandair
20 Oct - 05 Nov	Icelandair
09 Oct - 15 Oct	Icelandair
08 Oct - 15 Oct	Icelandair
18 Oct - 22 Oct	Icelandair
22 Oct - 05 Nov	Delta	direct
20 Oct - 05 Nov	Delta	direct
12 Oct - 01 Nov	Air Canada
08 Oct - 01 Nov	Air Canada
08 Oct - 15 Oct	Delta	direct
22 Oct - 29 Oct	Delta	direct
01 Oct - 08 Oct	Icelandair
18 Oct - 21 Oct	Scandinavian Airlines
15 Oct - 25 Oct	Delta	direct
11 Oct - 18 Oct	Air Canada
17 Oct - 25 Oct	KLM	direct

Also check the deals for one-way flights from Portland 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 Portland to Amsterdam in October from $547

Return flights