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

Return flights

05 Oct - 08 Oct	Ryanair
05 Oct - 07 Oct	Ryanair
20 Oct - 27 Oct	Ryanair
14 Oct - 22 Oct	Ryanair
12 Oct - 19 Oct	Ryanair
20 Oct - 23 Oct	Ryanair
14 Oct - 19 Oct	Ryanair
06 Oct - 14 Oct	Ryanair
13 Oct - 23 Oct	Ryanair
11 Oct - 19 Oct	Ryanair
29 Oct - 04 Nov	Ryanair
31 Oct - 09 Nov	Norwegian Air Sweden AOC
30 Oct - 04 Nov	Ryanair
25 Oct - 01 Nov	Ryanair
30 Oct - 03 Nov	Ryanair
24 Oct - 01 Nov	Norwegian Air Sweden AOC
25 Oct - 01 Nov	airBaltic	direct

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

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.

Book a cheap hotel in Porto

Cheap car rent in Porto

Cheapest return flights from Riga to Porto in October from 156€

Return flights