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

Return flights

10 Sep - 25 Sep	Copa
02 Sep - 07 Sep	Copa
13 Sep - 19 Sep	Avianca
12 Sep - 26 Sep	Avianca
17 Sep - 10 Oct	Avianca
13 Sep - 20 Sep	Avianca
01 Sep - 17 Sep	Avianca
10 Sep - 21 Sep	Avianca
22 Sep - 27 Sep	Avianca

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 309€

Return flights