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

Return flights

29 Dec - 14 Jan	Delta
29 Dec - 14 Jan	KLM	direct
14 Dec - 24 Dec	United
16 Dec - 06 Jan	Icelandair
11 Dec - 18 Dec	Alaska Airlines
23 Dec - 06 Jan	Sun Country Airlines
13 Dec - 28 Dec	Icelandair
01 Dec - 27 Dec	Icelandair
03 Dec - 27 Dec	Hawaiian Airlines
04 Dec - 27 Dec	Icelandair
17 Dec - 06 Jan	Hawaiian Airlines
02 Dec - 27 Dec	Icelandair
05 Dec - 27 Dec	Frontier Airlines
16 Dec - 28 Dec	Icelandair
21 Dec - 28 Dec	Delta
20 Dec - 05 Jan	Icelandair
08 Dec - 03 Jan	Icelandair
29 Dec - 04 Jan	Hawaiian Airlines
22 Dec - 04 Jan	Hawaiian Airlines
20 Dec - 04 Jan	Icelandair

Also check the deals for one-way flights from Portland to Amsterdam in December.

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 December from 471€

Return flights