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

Return flights

01 Sep - 10 Sep	Viva
01 Sep - 18 Sep	Viva
12 Sep - 18 Sep	Viva
01 Sep - 03 Sep	Viva
22 Sep - 11 Oct	Viva
01 Sep - 11 Sep	Viva
01 Sep - 04 Sep	Viva
22 Sep - 05 Oct	Viva
19 Sep - 05 Oct	Viva
01 Sep - 10 Sep	Avianca	direct
09 Sep - 19 Sep	Avianca	direct
24 Sep - 27 Sep	Avianca

Also check the deals for one-way flights from San Jose to Mexico City 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 San Jose to Mexico City in September from 164€

Return flights