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

Return flights

30 Sep - 01 Oct	Vueling Airlines
30 Sep - 07 Oct	Vueling Airlines
30 Sep - 14 Oct	Vueling Airlines
30 Sep - 08 Oct	Vueling Airlines
30 Sep - 13 Oct	Vueling Airlines
27 Sep - 01 Oct	easyJet
30 Sep - 10 Oct	Vueling Airlines
30 Sep - 02 Oct	Vueling Airlines
29 Sep - 30 Sep	Vueling Airlines
29 Sep - 13 Oct	Transavia France
29 Sep - 01 Oct	Transavia France
30 Sep - 30 Sep	Vueling Airlines
27 Sep - 30 Sep	TAP
23 Sep - 30 Sep	TAP
24 Sep - 30 Sep	easyJet
27 Sep - 29 Sep	TAP
29 Sep - 29 Sep	transavia
26 Sep - 30 Sep	Vueling Airlines
25 Sep - 30 Sep	TUI.nl
28 Sep - 29 Sep	transavia

Also check the deals for one-way flights from Amsterdam 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 Amsterdam to Porto in September from $228

Return flights