AirHint found the following cheapest return flights from San Jose (SJO) to La Fortuna/San Carlos (FON) in August 2025 (see full year).

Return flights

07 Aug - 14 Aug	Sansa Regional	direct
11 Aug - 18 Aug	Sansa Regional	direct
13 Aug - 20 Aug	Sansa Regional	direct
08 Aug - 15 Aug	Sansa Regional	direct
05 Aug - 07 Aug	Sansa Regional	direct
10 Aug - 17 Aug	Sansa Regional	direct

Also check the deals for one-way flights from San Jose to La Fortuna/San Carlos in August.

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 La Fortuna/San Carlos in August from 162€

Return flights