AirHint found the following cheapest return flights from San Juan (SJU) to San Jose (SJO) in October 2025 (see full year).

Return flights

11 Oct - 18 Oct	Copa
06 Oct - 16 Oct	Spirit Airlines
02 Oct - 16 Oct	Spirit Airlines
01 Oct - 16 Oct	Spirit Airlines
02 Oct - 03 Oct	Spirit Airlines
03 Oct - 16 Oct	Spirit Airlines
23 Oct - 24 Oct	Spirit Airlines
06 Oct - 24 Oct	Spirit Airlines
01 Oct - 03 Oct	Spirit Airlines
17 Oct - 24 Oct	Spirit Airlines

Also check the deals for one-way flights from San Juan to San Jose in October.

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 Juan to San Jose in October from 184€

Return flights