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

Return flights

01 Sep - 01 Oct	airBaltic
07 Sep - 25 Sep	airBaltic
11 Sep - 15 Sep	airBaltic
04 Sep - 07 Sep	airBaltic
07 Sep - 15 Sep	airBaltic
08 Sep - 15 Sep	airBaltic
04 Sep - 08 Sep	airBaltic
05 Sep - 08 Sep	airBaltic
18 Sep - 21 Sep	airBaltic
11 Sep - 22 Sep	airBaltic
15 Sep - 19 Sep	airBaltic
01 Sep - 01 Oct	Finnair	direct

Also check the deals for one-way flights from Helsinki to Prague 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 Prague in September from $175

Return flights