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

Return flights

09 Dec - 11 Dec	Ryanair
08 Dec - 11 Dec	Ryanair
09 Dec - 16 Dec	Ryanair
01 Dec - 04 Dec	Ryanair
01 Dec - 07 Dec	Ryanair
02 Dec - 05 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
09 Dec - 12 Dec	Ryanair
06 Dec - 09 Dec	Ryanair
28 Dec - 02 Jan	Ryanair
25 Dec - 01 Jan	easyJet
20 Dec - 03 Jan	Vueling Airlines
28 Dec - 05 Jan	Ryanair
26 Dec - 05 Jan	Ryanair
24 Dec - 03 Jan	Ryanair

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

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 December from 153€

Return flights