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

Return flights

19 Sep - 21 Sep	airBaltic	direct
25 Sep - 26 Sep	airBaltic	direct
06 Sep - 07 Sep	airBaltic	direct
11 Sep - 11 Sep	airBaltic	direct
11 Sep - 13 Sep	airBaltic	direct
05 Sep - 06 Sep	airBaltic	direct
05 Sep - 08 Sep	airBaltic	direct
13 Sep - 14 Sep	airBaltic	direct
25 Sep - 27 Sep	airBaltic	direct
26 Sep - 27 Sep	airBaltic	direct
29 Sep - 06 Oct	airBaltic	direct

Also check the deals for one-way flights from Riga to Helsinki 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 Riga to Helsinki in September from 73€

Return flights