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

Return flights

15 Aug - 28 Aug	Norwegian Air Sweden AOC
19 Aug - 26 Aug	Scandinavian Airlines
11 Aug - 15 Aug	Norwegian Air Sweden AOC
19 Aug - 26 Aug	airBaltic	direct
03 Aug - 15 Aug	Norwegian Air Sweden AOC
08 Aug - 12 Aug	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 242€

Return flights