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

Return flights

20 Sep - 21 Sep	airBaltic	direct
11 Sep - 14 Sep	airBaltic	direct
23 Sep - 25 Sep	airBaltic	direct
08 Sep - 15 Sep	airBaltic	direct
14 Sep - 21 Sep	airBaltic	direct
19 Sep - 21 Sep	airBaltic	direct
15 Sep - 20 Sep	airBaltic	direct
22 Sep - 26 Sep	airBaltic	direct
06 Sep - 08 Sep	airBaltic	direct
15 Sep - 17 Sep	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 74€

Return flights