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

Return flights

26 Aug - 31 Aug	Norwegian Air Sweden AOC
01 Aug - 05 Aug	airBaltic	direct
05 Aug - 08 Aug	airBaltic	direct
15 Aug - 26 Aug	airBaltic	direct
06 Aug - 09 Aug	Air Europa
16 Aug - 29 Aug	Air Serbia
16 Aug - 22 Aug	Vueling Airlines
17 Aug - 22 Aug	Vueling Airlines
14 Aug - 22 Aug	TAP

Also check the deals for one-way flights from Porto to Riga 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 Porto to Riga in August from $262

Return flights