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

Return flights

18 Aug - 27 Aug	Aeromexico
20 Aug - 27 Aug	Aeromexico
19 Aug - 26 Aug	Aeromexico
19 Aug - 27 Aug	Copa
19 Aug - 20 Aug	Aeromexico
18 Aug - 20 Aug	Aeromexico
22 Aug - 25 Aug	Aeromexico
24 Aug - 01 Sep	Aeromexico
16 Aug - 09 Sep	Aeromexico
20 Aug - 20 Aug	Copa
19 Aug - 19 Aug	Copa
17 Aug - 25 Aug	Copa
17 Aug - 10 Sep	Copa
29 Aug - 12 Sep	Aeromexico

Also check the deals for one-way flights from Guadalajara 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 Guadalajara to San Jose in August from 242€

Return flights