AirHint found the following cheapest return flights from Mexico City (MEX) to San Jose (SJO) in September 2026 (see full year).

Return flights

17 Sep - 29 Sep	Viva
17 Sep - 26 Sep	Viva
24 Sep - 29 Sep	Viva
18 Sep - 29 Sep	Viva
18 Sep - 26 Sep	Viva
11 Sep - 29 Sep	Viva
11 Sep - 19 Sep	Viva
11 Sep - 26 Sep	Viva
03 Sep - 19 Sep	Viva
03 Sep - 12 Sep	Viva
17 Sep - 03 Oct	Viva
24 Sep - 10 Oct	Viva
24 Sep - 03 Oct	Viva
18 Sep - 03 Oct	Viva
24 Sep - 13 Oct	Viva
25 Sep - 02 Oct	Viva
29 Sep - 06 Oct	Avianca	direct
25 Sep - 02 Oct	Aeromexico	direct

Also check the deals for one-way flights from Mexico City 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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from Mexico City to San Jose in September from $196

Return flights