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

Return flights

29 Aug - 08 Sep	Avianca
25 Aug - 01 Sep	Avianca	direct
22 Aug - 25 Aug	Avianca
31 Aug - 05 Sep	Avianca
29 Aug - 05 Sep	Avianca
29 Aug - 01 Sep	Avianca
19 Aug - 10 Sep	Avianca
28 Aug - 01 Sep	Avianca
30 Aug - 03 Sep	Avianca
25 Aug - 29 Aug	Avianca
16 Aug - 18 Aug	Copa
29 Aug - 04 Sep	Avianca
28 Aug - 30 Aug	Spirit Airlines
30 Aug - 01 Sep	Spirit Airlines
16 Aug - 23 Aug	Copa
18 Aug - 20 Aug	Copa
21 Aug - 23 Aug	Copa
26 Aug - 29 Aug	Spirit Airlines
25 Aug - 30 Aug	Spirit Airlines
26 Aug - 30 Aug	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 183€

Return flights