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

Return flights

07 Sep - 14 Sep	Ryanair	direct
07 Sep - 21 Sep	Ryanair	direct
07 Sep - 12 Sep	Ryanair	direct
07 Sep - 19 Sep	Ryanair	direct
26 Sep - 12 Oct	Ryanair	direct
17 Sep - 24 Sep	Ryanair
19 Sep - 21 Sep	Ryanair	direct
07 Sep - 11 Sep	Ryanair
26 Sep - 30 Sep	Ryanair
19 Sep - 10 Oct	Ryanair	direct
15 Sep - 21 Sep	Ryanair
11 Sep - 14 Sep	Ryanair
29 Sep - 04 Oct	Ryanair
27 Sep - 04 Oct	Ryanair
26 Sep - 10 Oct	Ryanair	direct
26 Sep - 01 Oct	Ryanair
27 Sep - 01 Oct	Ryanair
26 Sep - 02 Oct	Ryanair
19 Sep - 07 Oct	Ryanair	direct
26 Sep - 07 Oct	Ryanair	direct

Also check the deals for one-way flights from Treviso 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 Treviso to Porto in September from 131€

Return flights