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

Return flights

01 Dec - 07 Dec	Viva
01 Dec - 05 Dec	Viva
01 Dec - 10 Dec	Viva
01 Dec - 12 Dec	Viva
08 Dec - 10 Dec	Viva
08 Dec - 12 Dec	Viva
01 Dec - 02 Dec	Viva
07 Dec - 10 Dec	Viva
07 Dec - 12 Dec	Viva
01 Dec - 03 Dec	Viva
17 Dec - 10 Jan	Frontier Airlines
21 Dec - 10 Jan	Viva
14 Dec - 02 Jan	Viva
14 Dec - 02 Jan	Viva	direct
17 Dec - 02 Jan	Viva
20 Dec - 10 Jan	Viva
17 Dec - 02 Jan	Viva	direct
21 Dec - 02 Jan	Viva
21 Dec - 02 Jan	Viva	direct
20 Dec - 02 Jan	Viva	direct

Also check the deals for one-way flights from Chicago 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 Chicago to Monterrey in December from 244€

Return flights