AirHint found the following cheapest return flights from Porto (OPO) to Prague (PRG) in August 2025 (see full year).

Return flights

27 Aug - 01 Sep	Ryanair
27 Aug - 03 Sep	Ryanair
28 Aug - 01 Sep	Vueling Airlines
28 Aug - 04 Sep	Vueling Airlines
29 Aug - 01 Sep	Norwegian
31 Aug - 04 Sep	Air Serbia
29 Aug - 02 Sep	Norwegian
30 Aug - 03 Sep	easyJet
25 Aug - 01 Sep	Vueling Airlines
31 Aug - 01 Sep	Air Serbia
26 Aug - 30 Aug	Ryanair
23 Aug - 27 Aug	Ryanair
27 Aug - 31 Aug	Ryanair
23 Aug - 30 Aug	Ryanair
28 Aug - 29 Aug	Vueling Airlines
28 Aug - 30 Aug	Vueling Airlines
29 Aug - 31 Aug	Norwegian
22 Aug - 24 Aug	Ryanair
22 Aug - 27 Aug	Ryanair
18 Aug - 20 Aug	TAP

Also check the deals for one-way flights from Porto to Prague in August.

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 Prague in August from 215€

Return flights