AirHint found the following cheapest one-way flights from Copenhagen (CPH) to Porto (OPO) in September 2025 (see full year).

One-Way flights

28 Sep	Ryanair	direct
01 Sep	easyJet
30 Sep	Norwegian Air Sweden AOC	direct
29 Sep	Ryanair
21 Sep	Ryanair	direct
24 Sep	Ryanair
10 Sep	Transavia France
12 Sep	Transavia France
15 Sep	Ryanair
09 Sep	easyJet

Also check the deals for return flights from Copenhagen to Porto 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 one-way flights from Copenhagen to Porto in September from 53€

One-Way flights