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

Return flights

30 Jul - 17 Aug	Ryanair
30 Jul - 06 Aug	Ryanair
30 Jul - 13 Aug	Ryanair
16 Jul - 26 Jul	Vueling Airlines
14 Jul - 23 Jul	Ryanair
12 Jul - 23 Jul	Transavia France
16 Jul - 23 Jul	TAP
14 Jul - 21 Jul	Ryanair
15 Jul - 23 Jul	Vueling Airlines
12 Jul - 20 Jul	Transavia France
12 Jul - 22 Jul	Transavia France
12 Jul - 21 Jul	Transavia France
12 Jul - 19 Jul	Transavia France
23 Jul - 07 Aug	airBaltic
30 Jul - 13 Aug	airBaltic	direct
30 Jul - 06 Aug	airBaltic	direct

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

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 July from 248€

Return flights