AirHint found the following cheapest return flights from Mexico City (MEX) to San Antonio (SAT) in September 2025 (see full year).

Return flights

25 Sep - 29 Sep	Viva
25 Sep - 30 Sep	Viva
10 Sep - 24 Sep	Viva	direct
03 Sep - 04 Sep	Volaris	direct
03 Sep - 06 Sep	Volaris	direct
04 Sep - 08 Sep	Volaris	direct
11 Sep - 19 Sep	Viva	direct
11 Sep - 20 Sep	Viva	direct
11 Sep - 22 Sep	Viva	direct
11 Sep - 23 Sep	Viva	direct
22 Sep - 07 Oct	Viva	direct
22 Sep - 12 Oct	Viva	direct
22 Sep - 04 Oct	Viva	direct
22 Sep - 06 Oct	Viva	direct
22 Sep - 11 Oct	Viva	direct
24 Sep - 07 Oct	Viva	direct
24 Sep - 12 Oct	Viva	direct
24 Sep - 13 Oct	Viva	direct
24 Sep - 14 Oct	Viva	direct
24 Sep - 04 Oct	Viva	direct

Also check the deals for one-way flights from Mexico City to San Antonio 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 Mexico City to San Antonio in September from $210

Return flights