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

Return flights

26 Aug - 02 Sep	Volaris	direct
28 Aug - 02 Sep	Avianca
25 Aug - 29 Aug	Avianca
26 Aug - 31 Aug	Avianca
28 Aug - 04 Sep	Avianca
29 Aug - 05 Sep	Avianca
27 Aug - 08 Sep	Volaris	direct
26 Aug - 28 Aug	Copa
20 Aug - 27 Aug	Copa
30 Aug - 17 Sep	Copa
30 Aug - 18 Sep	Copa
25 Aug - 29 Aug	Volaris	direct
24 Aug - 27 Aug	Avianca
24 Aug - 26 Aug	Avianca
30 Aug - 17 Sep	Volaris	direct
30 Aug - 12 Sep	Copa

Also check the deals for one-way flights from Cancun 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 Cancun to San Jose in August from 166€

Return flights