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

Return flights

16 Sep - 23 Sep	Volaris	direct
30 Sep - 07 Oct	Volaris	direct
03 Sep - 09 Sep	Volaris	direct
05 Sep - 08 Sep	Volaris	direct
07 Sep - 30 Sep	Avianca
02 Sep - 09 Sep	Volaris	direct
24 Sep - 29 Sep	Volaris	direct
02 Sep - 05 Sep	Volaris	direct
02 Sep - 10 Sep	Volaris	direct
27 Sep - 06 Oct	Avianca
20 Sep - 24 Sep	Avianca
12 Sep - 17 Sep	Volaris	direct
18 Sep - 02 Oct	Copa
27 Sep - 01 Oct	Avianca

Also check the deals for one-way flights from Cancun to San Jose in September.

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 September from $196

Return flights