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

Return flights

25 Sep - 02 Oct	Ryanair
05 Sep - 10 Sep	Ryanair
18 Sep - 25 Sep	Wizz Air Malta
15 Sep - 22 Sep	Ryanair
20 Sep - 23 Sep	Ryanair
10 Sep - 14 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
05 Sep - 09 Sep	Ryanair
30 Sep - 07 Oct	Ryanair
11 Sep - 18 Sep	Ryanair
09 Sep - 23 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
27 Sep - 02 Oct	Ryanair
30 Sep - 08 Oct	Ryanair
23 Sep - 02 Oct	Ryanair
27 Sep - 04 Oct	Ryanair
22 Sep - 07 Oct	Ryanair
24 Sep - 01 Oct	Ryanair
21 Sep - 02 Oct	Ryanair
30 Sep - 04 Oct	Ryanair

Also check the deals for one-way flights from Treviso to Lisbon 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 Lisbon in September from 135€

Return flights