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

Return flights

15 Oct - 29 Oct	Hawaiian Airlines
15 Oct - 28 Oct	Hawaiian Airlines
22 Oct - 05 Nov	Icelandair
22 Oct - 05 Nov	Delta	direct
01 Oct - 15 Oct	Condor
14 Oct - 28 Oct	Condor
15 Oct - 29 Oct	Delta	direct
14 Oct - 29 Oct	Delta
23 Oct - 15 Nov	United
17 Oct - 25 Oct	KLM	direct
15 Oct - 18 Oct	Hawaiian Airlines
15 Oct - 18 Oct	Delta	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 563€

Return flights