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

Return flights

10 Dec - 17 Dec	Viva	direct
11 Dec - 15 Dec	Viva	direct
03 Dec - 15 Dec	Viva	direct
06 Dec - 15 Dec	Viva	direct
02 Dec - 15 Dec	Viva	direct
01 Dec - 15 Dec	Viva	direct
10 Dec - 15 Dec	Viva	direct
03 Dec - 17 Dec	Viva	direct
06 Dec - 17 Dec	Viva	direct
13 Dec - 15 Dec	Viva	direct
24 Dec - 12 Jan	Viva	direct
31 Dec - 19 Jan	Viva	direct
31 Dec - 20 Jan	Viva	direct
31 Dec - 21 Jan	Viva	direct
31 Dec - 12 Jan	Viva	direct
24 Dec - 09 Jan	Viva	direct
31 Dec - 09 Jan	Viva	direct
30 Dec - 19 Jan	Viva	direct
30 Dec - 20 Jan	Viva	direct
30 Dec - 12 Jan	Viva	direct

Also check the deals for one-way flights from San Antonio to Monterrey 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.

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Cheapest return flights from San Antonio to Monterrey in December from $206

Return flights