AirHint found the following cheapest one-way flights from Miami (MIA) to San Jose (SJO) in August 2025 (see full year).

One-Way flights

18 Aug	Volaris El Salvador	direct
29 Aug	Volaris El Salvador	direct
11 Aug	Volaris El Salvador	direct
01 Aug	Volaris El Salvador	direct
08 Aug	Volaris El Salvador	direct
28 Aug	Avianca	direct
05 Aug	Avianca	direct
20 Aug	Avianca
20 Aug	Avianca	direct
17 Aug	Avianca	direct

Also check the deals for return flights from Miami to San Jose 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 one-way flights from Miami to San Jose in August from $90

One-Way flights