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

Return flights

22 Aug - 29 Aug	Avianca
21 Aug - 25 Aug	Avianca	direct
07 Aug - 15 Aug	Avianca
06 Aug - 11 Aug	Avianca
08 Aug - 24 Aug	Avianca
08 Aug - 11 Aug	Avianca
22 Aug - 25 Aug	Avianca
05 Aug - 14 Aug	Avianca
01 Aug - 11 Aug	Avianca
01 Aug - 09 Aug	Avianca
22 Aug - 11 Sep	Spirit Airlines
22 Aug - 12 Sep	Spirit Airlines
18 Aug - 08 Sep	Spirit Airlines
22 Aug - 08 Sep	Spirit Airlines
28 Aug - 11 Sep	Spirit Airlines
28 Aug - 13 Sep	Spirit Airlines
28 Aug - 17 Sep	Spirit Airlines
29 Aug - 11 Sep	Spirit Airlines
29 Aug - 13 Sep	Spirit Airlines
29 Aug - 17 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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Cheapest return flights from San Jose to San Juan in August from 180€

Return flights