AirHint found the following cheapest return flights from Porto (OPO) to Copenhagen (CPH) in September 2026 (see full year).

Return flights

11 Sep - 12 Sep	Ryanair	direct
11 Sep - 22 Sep	Ryanair	direct
12 Sep - 20 Sep	Vueling Airlines
07 Sep - 11 Sep	Iberia
04 Sep - 12 Sep	Ryanair	direct
04 Sep - 05 Sep	Ryanair	direct
04 Sep - 07 Sep	Ryanair	direct
04 Sep - 22 Sep	Ryanair	direct
04 Sep - 11 Sep	Ryanair	direct
28 Sep - 02 Oct	Ryanair
05 Sep - 12 Sep	Ryanair	direct
28 Sep - 02 Oct	Ryanair	direct
22 Sep - 02 Oct	Norwegian Air Sweden AOC	direct
12 Sep - 02 Oct	Ryanair	direct
11 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Porto to Copenhagen in September.

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 September from $191

Return flights