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

Return flights

06 Sep - 02 Oct	Ryanair
30 Sep - 07 Oct	Ryanair
06 Sep - 17 Sep	Ryanair
20 Sep - 02 Oct	Ryanair
25 Sep - 07 Oct	Ryanair
06 Sep - 01 Oct	Ryanair
06 Sep - 30 Sep	Ryanair
20 Sep - 24 Sep	Ryanair
20 Sep - 01 Oct	Ryanair
23 Sep - 07 Oct	Ryanair
18 Sep - 02 Oct	Ryanair
28 Sep - 01 Oct	Ryanair
20 Sep - 08 Oct	Ryanair	direct
24 Sep - 30 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
13 Sep - 17 Sep	Ryanair
06 Sep - 10 Sep	Ryanair
06 Sep - 23 Sep	Ryanair
16 Sep - 30 Sep	Ryanair
25 Sep - 30 Sep	Ryanair

Also check the deals for one-way flights from Hahn 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 Hahn to Porto in September from $138

Return flights