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

Return flights

21 Aug - 31 Aug	Aeromexico
22 Aug - 01 Sep	Aeromexico
15 Aug - 22 Aug	Aeromexico
17 Aug - 27 Aug	Aeromexico
24 Aug - 30 Aug	Aeromexico
20 Aug - 25 Aug	Aeromexico
05 Aug - 14 Aug	Aeromexico
01 Aug - 08 Aug	Aeromexico
05 Aug - 12 Aug	Aeromexico
06 Aug - 13 Aug	Aeromexico
08 Aug - 13 Aug	Aeromexico
31 Aug - 07 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 245€

Return flights