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

Return flights

01 Sep - 11 Sep	Copa
24 Sep - 29 Sep	Copa
02 Sep - 09 Sep	Copa
10 Sep - 23 Sep	Copa
26 Sep - 11 Oct	Avianca
16 Sep - 25 Sep	Copa
04 Sep - 18 Sep	Copa
11 Sep - 18 Sep	Copa
18 Sep - 25 Sep	LATAM Airlines Group
11 Sep - 19 Sep	LATAM Airlines Group
18 Sep - 27 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 $365

Return flights