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

Return flights

17 Aug - 24 Aug	Volaris El Salvador	direct
18 Aug - 24 Aug	Volaris El Salvador	direct
21 Aug - 25 Aug	Avianca
19 Aug - 26 Aug	Avianca
20 Aug - 27 Aug	Avianca
21 Aug - 24 Aug	Avianca	direct
24 Aug - 13 Sep	Avianca
29 Aug - 05 Sep	Avianca
29 Aug - 30 Aug	Avianca	direct
28 Aug - 31 Aug	Avianca	direct
27 Aug - 31 Aug	Copa
26 Aug - 01 Sep	Copa
27 Aug - 01 Sep	Copa
19 Aug - 20 Aug	Avianca
28 Aug - 21 Sep	Avianca
29 Aug - 01 Sep	Avianca
30 Aug - 01 Sep	Avianca	direct

Also check the deals for one-way 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 return flights from Miami to San Jose in August from 177€

Return flights