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

Return flights

24 Aug - 02 Sep	KLM
30 Aug - 07 Sep	KLM
28 Aug - 01 Sep	KLM
21 Aug - 27 Aug	Lufthansa
29 Aug - 08 Sep	KLM
21 Aug - 26 Aug	Lufthansa
20 Aug - 27 Aug	Lufthansa
21 Aug - 25 Aug	Lufthansa
22 Aug - 26 Aug	Lufthansa
18 Aug - 30 Aug	Lufthansa
12 Aug - 22 Aug	Lufthansa
28 Aug - 31 Aug	KLM
22 Aug - 24 Aug	Lufthansa
12 Aug - 16 Aug	Lufthansa
09 Aug - 23 Sep	KLM

Also check the deals for one-way flights from Stuttgart to Helsinki 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 Stuttgart to Helsinki in August from $224

Return flights