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

Return flights

02 Mar - 09 Mar	Ryanair
06 Mar - 16 Mar	Ryanair
09 Mar - 17 Mar	Ryanair
06 Mar - 09 Mar	Ryanair
12 Mar - 16 Mar	Ryanair
19 Mar - 22 Mar	Ryanair
13 Mar - 20 Mar	Ryanair
13 Mar - 16 Mar	Ryanair
20 Mar - 23 Mar	Scandinavian Airlines
30 Mar - 04 Apr	Norwegian
28 Mar - 31 Mar	Ryanair

Also check the deals for one-way flights from Porto to Riga in March.

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 March from 140€

Return flights