Cheapest return flights from Porto to Riga in September from 170€

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

Return flights

19 Sep - 28 Sep Ryanair
06 Sep - 13 Sep Norwegian Air Sweden AOC
23 Sep - 30 Sep Ryanair
15 Sep - 19 Sep Ryanair
03 Sep - 15 Sep Norwegian Air Sweden AOC
12 Sep - 16 Sep Ryanair
25 Sep - 30 Sep easyJet
16 Sep - 20 Sep Ryanair
18 Sep - 22 Sep Ryanair
03 Sep - 16 Sep Norwegian

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

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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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