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

Return flights

13 Aug - 03 Sep	Ryanair	direct
17 Aug - 03 Sep	Ryanair	direct
13 Aug - 11 Sep	Ryanair
21 Aug - 09 Sep	Norwegian Air Sweden AOC
26 Aug - 09 Sep	Norwegian Air Sweden AOC
24 Aug - 09 Sep	Ryanair
13 Aug - 01 Sep	Ryanair
17 Aug - 01 Sep	Ryanair
17 Aug - 25 Aug	Ryanair
17 Aug - 28 Aug	Ryanair
21 Aug - 10 Sep	Norwegian Air Sweden AOC
26 Aug - 10 Sep	Norwegian Air Sweden AOC
17 Aug - 26 Aug	Ryanair
13 Aug - 28 Aug	Ryanair
10 Aug - 28 Aug	Ryanair
17 Aug - 27 Aug	Ryanair
13 Aug - 29 Aug	Ryanair
10 Aug - 29 Aug	Ryanair
17 Aug - 29 Aug	Ryanair
13 Aug - 27 Aug	Ryanair

Also check the deals for one-way flights from Copenhagen to Porto 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 Copenhagen to Porto in August from 123€

Return flights