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

Return flights

10 Sep - 21 Sep	Ryanair
20 Sep - 04 Oct	Ryanair
12 Sep - 21 Sep	Vueling Airlines
21 Sep - 05 Oct	Wizz Air Malta
11 Sep - 24 Sep	Ryanair
30 Sep - 08 Oct	Ryanair
18 Sep - 08 Oct	Wizz Air Malta
23 Sep - 05 Oct	TAP
25 Sep - 05 Oct	Wizz Air Malta
19 Sep - 05 Oct	Vueling Airlines
18 Sep - 28 Sep	Ryanair
22 Sep - 06 Oct	Wizz Air Malta
22 Sep - 05 Oct	Wizz Air Malta
27 Sep - 06 Oct	Ryanair
07 Sep - 14 Sep	Volotea
14 Sep - 22 Sep	Condor
02 Sep - 15 Sep	TAP
06 Sep - 20 Sep	Vueling Airlines
02 Sep - 09 Sep	TAP
03 Sep - 22 Sep	Air France

Also check the deals for one-way flights from Rome to San Jose 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 San Jose in September from $626

Return flights