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

Return flights

18 Aug - 25 Aug	Norwegian Air Sweden AOC
13 Aug - 24 Aug	Lufthansa
15 Aug - 23 Aug	Lufthansa
13 Aug - 16 Aug	Lufthansa
15 Aug - 22 Aug	Lufthansa
13 Aug - 20 Aug	Lufthansa
13 Aug - 18 Aug	Lufthansa
09 Aug - 14 Aug	Lufthansa
09 Aug - 12 Aug	Lufthansa
08 Aug - 13 Aug	Lufthansa
29 Aug - 02 Sep	airBaltic
29 Aug - 02 Sep	Finnair	direct

Also check the deals for one-way flights from Helsinki to Prague in August.

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 August from $150

Return flights