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

Return flights

17 Sep - 01 Oct	Wizz Air Malta
11 Sep - 21 Sep	Ryanair
18 Sep - 03 Oct	Norse Atlantic Airways
10 Sep - 21 Sep	Ryanair
18 Sep - 25 Sep	Norse Atlantic Airways
14 Sep - 27 Sep	TAP
13 Sep - 26 Sep	Wizz Air Malta
14 Sep - 28 Sep	Wizz Air Malta
10 Sep - 24 Sep	Ryanair
13 Sep - 27 Sep	Wizz Air Malta
03 Sep - 22 Sep	Wizz Air Malta
02 Sep - 22 Sep	Ryanair
02 Sep - 01 Oct	Delta
29 Sep - 15 Oct	Wizz Air Malta
29 Sep - 16 Oct	United
19 Sep - 03 Oct	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 647€

Return flights