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

Return flights

25 Sep - 01 Oct	LATAM Airlines Group
18 Sep - 27 Sep	Avianca
19 Sep - 26 Sep	Avianca
02 Sep - 13 Sep	Avianca
18 Sep - 28 Sep	Avianca
22 Sep - 30 Sep	LATAM Airlines Group
07 Sep - 28 Sep	LATAM Airlines Group
10 Sep - 22 Sep	Copa
08 Sep - 23 Sep	Copa
05 Sep - 22 Sep	LATAM Airlines Group
11 Sep - 22 Sep	LATAM Airlines Group

Also check the deals for one-way flights from Santiago 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 Santiago to San Jose in September from 318€

Return flights