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

Return flights

11 Aug - 17 Aug	Avianca	direct
26 Aug - 31 Aug	Avianca	direct
15 Aug - 30 Aug	Avianca	direct
12 Aug - 24 Aug	Avianca
22 Aug - 31 Aug	Avianca
04 Aug - 15 Aug	Avianca
01 Aug - 09 Aug	Avianca	direct
25 Aug - 30 Aug	Avianca
01 Aug - 04 Aug	Avianca	direct
01 Aug - 17 Aug	Avianca	direct
26 Aug - 10 Sep	Avianca
29 Aug - 07 Sep	Avianca	direct
25 Aug - 02 Sep	Avianca
29 Aug - 19 Sep	Avianca	direct
19 Aug - 30 Sep	Avianca	direct
02 Aug - 02 Sep	Avianca	direct
03 Aug - 02 Sep	Avianca

Also check the deals for one-way flights from Mexico City 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 Mexico City to San Jose in August from 199€

Return flights