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

Return flights

03 Aug - 17 Aug	Aeromexico
18 Aug - 25 Aug	Aeromexico
27 Aug - 05 Sep	Aeromexico
06 Aug - 11 Aug	Aeromexico
05 Aug - 14 Aug	Aeromexico
24 Aug - 31 Aug	Aeromexico
08 Aug - 11 Aug	Aeromexico
04 Aug - 11 Aug	Aeromexico
05 Aug - 12 Aug	Aeromexico
06 Aug - 13 Aug	Aeromexico
13 Aug - 18 Aug	Aeromexico
27 Aug - 07 Sep	Aeromexico
28 Aug - 08 Sep	Aeromexico
27 Aug - 01 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