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

Return flights

29 Jun - 07 Jul	Icelandair
27 Jun - 04 Jul	Frontier Airlines
26 Jun - 03 Jul	Sun Country Airlines
25 Jun - 09 Jul	Air France
26 Jun - 07 Jul	Frontier Airlines
29 Jun - 07 Jul	Delta	direct
25 Jun - 09 Jul	Delta	direct
25 Jun - 02 Jul	Delta	direct
27 Jun - 04 Jul	KLM	direct

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

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 June from $1064

Return flights