AirHint found the following cheapest return flights from Berlin (BER) to Porto (OPO) in September 2025 (see full year).

Return flights

20 Sep - 27 Sep	Transavia France
10 Sep - 30 Sep	easyJet
18 Sep - 09 Oct	Ryanair	direct
10 Sep - 17 Sep	easyJet
18 Sep - 24 Sep	Ryanair
19 Sep - 24 Sep	easyJet
04 Sep - 24 Sep	easyJet
16 Sep - 30 Sep	easyJet
10 Sep - 16 Sep	easyJet
01 Sep - 30 Sep	easyJet
24 Sep - 30 Sep	easyJet
17 Sep - 07 Oct	easyJet
29 Sep - 16 Oct	Ryanair	direct
11 Sep - 01 Oct	easyJet
29 Sep - 09 Oct	Ryanair	direct
26 Sep - 01 Oct	easyJet
26 Sep - 02 Oct	easyJet
25 Sep - 01 Oct	easyJet
29 Sep - 10 Oct	easyJet
29 Sep - 02 Oct	Ryanair	direct

Also check the deals for one-way flights from Berlin 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 return flights from Berlin to Porto in September from 126€

Return flights