AirHint found the following cheapest return flights from Riga (RIX) to Porto (OPO) in August 2026 (see full year).

Return flights

29 Aug - 05 Sep	airBaltic
19 Aug - 26 Aug	airBaltic	direct
08 Aug - 19 Aug	airBaltic	direct
29 Aug - 06 Sep	airBaltic
08 Aug - 18 Aug	Scandinavian Airlines
10 Aug - 12 Aug	Scandinavian Airlines
08 Aug - 15 Aug	airBaltic	direct
10 Aug - 19 Aug	Norwegian Air Sweden AOC
05 Aug - 12 Aug	Scandinavian Airlines
12 Aug - 15 Aug	airBaltic	direct
12 Aug - 19 Aug	Scandinavian Airlines
06 Aug - 14 Aug	LOT
29 Aug - 05 Sep	airBaltic	direct

Also check the deals for one-way flights from Riga to Porto 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 Riga to Porto in August from $261

Return flights