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

Return flights

07 Dec - 09 Dec	Viva	direct
07 Dec - 12 Dec	Viva	direct
07 Dec - 13 Dec	Viva	direct
07 Dec - 14 Dec	Viva	direct
04 Dec - 06 Dec	Viva	direct
04 Dec - 07 Dec	Viva	direct
04 Dec - 05 Dec	Viva	direct
04 Dec - 09 Dec	Viva	direct
04 Dec - 12 Dec	Viva	direct
04 Dec - 13 Dec	Viva	direct
22 Dec - 04 Jan	United
24 Dec - 12 Jan	Viva	direct
24 Dec - 13 Jan	Viva	direct
25 Dec - 12 Jan	Viva	direct
25 Dec - 13 Jan	Viva	direct
25 Dec - 14 Jan	Viva	direct
31 Dec - 20 Jan	Viva	direct
31 Dec - 12 Jan	Viva	direct
31 Dec - 13 Jan	Viva	direct
31 Dec - 14 Jan	Viva	direct

Also check the deals for one-way flights from Mexico City to San Antonio in December.

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 Antonio

Cheap car rent in San Antonio

Cheapest return flights from Mexico City to San Antonio in December from $220

Return flights