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

Return flights

09 Dec - 14 Dec	Icelandair
03 Dec - 10 Dec	British Airways
07 Dec - 14 Dec	British Airways
11 Dec - 18 Dec	British Airways
08 Dec - 17 Dec	Icelandair
25 Dec - 31 Dec	British Airways
03 Dec - 10 Dec	Delta	direct
07 Dec - 14 Dec	KLM	direct
15 Dec - 22 Dec	British Airways
12 Dec - 19 Dec	Delta

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 $440

Return flights