AirHint found the following cheapest return flights from San Jose (SJO) to Santiago (SCL) in September 2026 (see full year).

Return flights

12 Sep - 19 Sep	Avianca
01 Sep - 08 Sep	Avianca
30 Sep - 05 Oct	Avianca
26 Sep - 03 Oct	Avianca
03 Sep - 09 Sep	LATAM Airlines Group
18 Sep - 30 Sep	Copa
07 Sep - 16 Sep	Copa
10 Sep - 15 Sep	Copa
19 Sep - 26 Sep	Copa
01 Sep - 16 Sep	Copa
11 Sep - 16 Sep	Copa
03 Sep - 13 Sep	Copa

Also check the deals for one-way flights from San Jose to Santiago 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 San Jose to Santiago in September from 339€

Return flights