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

Return flights

25 Sep - 10 Oct	Ryanair
30 Sep - 07 Oct	easyJet
18 Sep - 25 Sep	Ryanair
16 Sep - 25 Sep	Ryanair
24 Sep - 01 Oct	Vueling Airlines
30 Sep - 03 Oct	Ryanair
27 Sep - 05 Oct	Ryanair
26 Sep - 09 Oct	Ryanair
16 Sep - 07 Oct	Ryanair
20 Sep - 29 Sep	Ryanair
27 Sep - 07 Oct	Ryanair
24 Sep - 29 Sep	Vueling Airlines
23 Sep - 01 Oct	Ryanair
16 Sep - 01 Oct	Ryanair
25 Sep - 29 Sep	Ryanair
26 Sep - 30 Sep	easyJet
25 Sep - 30 Sep	Ryanair
20 Sep - 30 Sep	Ryanair
23 Sep - 29 Sep	Ryanair
16 Sep - 30 Sep	Ryanair

Also check the deals for one-way flights from Hamburg 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 Hamburg to Porto in September from 143€

Return flights