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

Return flights

17 Aug - 27 Aug	Viva	direct
20 Aug - 31 Aug	Viva	direct
17 Aug - 31 Aug	Viva	direct
20 Aug - 27 Aug	Viva	direct
20 Aug - 24 Aug	Viva	direct
17 Aug - 24 Aug	Viva	direct
20 Aug - 29 Aug	Viva	direct
17 Aug - 29 Aug	Viva	direct
20 Aug - 10 Sep	Viva	direct
29 Aug - 31 Aug	Viva	direct
20 Aug - 07 Sep	Viva	direct
17 Aug - 07 Sep	Viva	direct
29 Aug - 10 Sep	Viva	direct
29 Aug - 19 Sep	Viva	direct
17 Aug - 20 Aug	Viva	direct
29 Aug - 07 Sep	Viva	direct

Also check the deals for one-way flights from Austin to Monterrey in August.

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 August from 190€

Return flights