Cheapest return flights from Portland to Amsterdam in September from $720

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

Return flights

17 Sep - 11 Oct Scandinavian Airlines
15 Sep - 27 Sep Alaska Airlines
29 Sep - 06 Oct Icelandair
18 Sep - 24 Sep Frontier Airlines
05 Sep - 12 Sep Frontier Airlines
12 Sep - 21 Sep Air Canada
11 Sep - 20 Sep Frontier Airlines
20 Sep - 26 Sep Frontier Airlines
14 Sep - 27 Sep Spirit Airlines
02 Sep - 17 Sep KLM
12 Sep - 20 Sep Scandinavian Airlines
03 Sep - 05 Sep Alaska Airlines
17 Sep - 11 Oct KLM direct

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

Skyscanner

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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