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

Return flights

03 Dec - 12 Dec	Viva	direct
03 Dec - 15 Dec	Viva	direct
12 Dec - 15 Dec	Viva	direct
03 Dec - 21 Dec	Viva	direct
03 Dec - 24 Dec	Viva	direct
12 Dec - 21 Dec	Viva	direct
12 Dec - 24 Dec	Viva	direct
15 Dec - 21 Dec	Viva	direct
15 Dec - 24 Dec	Viva	direct
15 Dec - 04 Jan	Viva	direct
24 Dec - 04 Jan	Viva	direct
28 Dec - 04 Jan	Viva	direct
19 Dec - 21 Dec	Viva	direct
19 Dec - 04 Jan	Viva	direct
21 Dec - 04 Jan	Viva	direct

Also check the deals for one-way flights from Austin 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 Austin to Monterrey in December from 310€

Return flights