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

Return flights

01 Aug - 07 Aug	Avianca
05 Aug - 10 Aug	Avianca
08 Aug - 23 Aug	Avianca	direct
01 Aug - 05 Aug	Avianca	direct
21 Aug - 27 Aug	Avianca
13 Aug - 23 Aug	Avianca	direct
15 Aug - 22 Aug	Avianca	direct
11 Aug - 22 Aug	Avianca
31 Aug - 15 Sep	Avianca	direct
22 Aug - 24 Aug	Avianca	direct
12 Aug - 14 Aug	Avianca
27 Aug - 01 Sep	Avianca
26 Aug - 02 Sep	Copa
29 Aug - 01 Sep	Copa
28 Aug - 01 Sep	Copa
29 Aug - 02 Sep	Copa
29 Aug - 02 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 179€

Return flights