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

Return flights

27 Aug - 14 Sep	Ryanair	direct
26 Aug - 14 Sep	Vueling Airlines
27 Aug - 01 Sep	Vueling Airlines
31 Aug - 14 Sep	Ryanair	direct
27 Aug - 07 Sep	Ryanair	direct
26 Aug - 07 Sep	Vueling Airlines
27 Aug - 03 Sep	Ryanair	direct
26 Aug - 03 Sep	Vueling Airlines
29 Aug - 07 Sep	Ryanair
27 Aug - 31 Aug	Ryanair
29 Aug - 04 Sep	Ryanair
27 Aug - 31 Aug	Ryanair	direct
26 Aug - 31 Aug	Vueling Airlines
28 Aug - 31 Aug	TAP
25 Aug - 31 Aug	TAP
25 Aug - 27 Aug	Ryanair
22 Aug - 31 Aug	TAP
26 Aug - 28 Aug	Vueling Airlines
27 Aug - 28 Aug	Ryanair
27 Aug - 30 Aug	Ryanair

Also check the deals for one-way flights from Porto to Copenhagen 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 Copenhagen in August from $229

Return flights