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

Return flights

16 Sep - 18 Sep	Norwegian Air Sweden AOC
23 Sep - 27 Sep	Norwegian Air Sweden AOC
10 Sep - 18 Sep	airBaltic
04 Sep - 07 Sep	airBaltic
14 Sep - 16 Sep	airBaltic
01 Sep - 04 Sep	airBaltic
04 Sep - 08 Sep	airBaltic
26 Sep - 29 Sep	airBaltic
05 Sep - 11 Sep	airBaltic
08 Sep - 11 Sep	airBaltic

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

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 Helsinki to Amsterdam in September from $202

Return flights