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

Return flights

15 Aug - 24 Aug	Lufthansa
15 Aug - 22 Aug	Lufthansa
15 Aug - 17 Aug	Lufthansa
14 Aug - 17 Aug	Lufthansa
25 Aug - 01 Sep	Lufthansa
12 Aug - 16 Aug	Air France
07 Aug - 17 Aug	Lufthansa
08 Aug - 15 Aug	KLM
07 Aug - 14 Aug	Air France
07 Aug - 10 Aug	Lufthansa
05 Aug - 09 Aug	KLM

Also check the deals for one-way flights from Helsinki to Basel 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 Basel in August from 175€

Return flights