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

Return flights

29 Sep - 07 Oct	Ryanair
29 Sep - 06 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
26 Sep - 01 Oct	Ryanair
30 Sep - 01 Oct	Wizz Air Malta
30 Sep - 06 Oct	Wizz Air Malta
23 Sep - 01 Oct	Ryanair
30 Sep - 02 Oct	Wizz Air Malta
27 Sep - 18 Oct	Wizz Air Malta
27 Sep - 01 Oct	Wizz Air Malta
27 Sep - 28 Sep	Wizz Air Malta
26 Sep - 28 Sep	Ryanair
26 Sep - 29 Sep	Ryanair
29 Sep - 30 Sep	Ryanair
23 Sep - 28 Sep	Ryanair
27 Sep - 29 Sep	Wizz Air Malta
26 Sep - 30 Sep	Ryanair
27 Sep - 30 Sep	Wizz Air Malta
27 Sep - 28 Sep	Wizz Air Malta	direct
24 Sep - 28 Sep	Wizz Air Malta

Also check the deals for one-way flights from Rome 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 Rome to Lisbon in September from $119

Return flights