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

Return flights

25 Aug - 29 Aug	Avianca	direct
15 Aug - 01 Sep	Avianca	direct
22 Aug - 24 Aug	Avianca
12 Aug - 15 Aug	Avianca
15 Aug - 17 Aug	Avianca
15 Aug - 18 Aug	Avianca	direct
22 Aug - 25 Aug	Avianca
18 Aug - 25 Aug	Avianca
27 Aug - 01 Sep	Avianca
28 Aug - 01 Sep	Avianca
11 Aug - 14 Aug	Avianca
21 Aug - 23 Aug	Avianca
29 Aug - 01 Sep	Avianca	direct
10 Aug - 14 Aug	Copa
19 Aug - 05 Sep	Spirit Airlines
19 Aug - 02 Sep	Spirit Airlines
30 Aug - 05 Sep	Spirit Airlines
25 Aug - 05 Sep	Spirit Airlines
26 Aug - 05 Sep	Spirit Airlines
30 Aug - 18 Sep	Spirit Airlines

Also check the deals for one-way flights from San Jose to San Juan 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 San Juan in August from 178€

Return flights