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

Return flights

31 Dec - 19 Jan	Viva	direct
31 Dec - 18 Jan	Viva	direct
31 Dec - 16 Jan	Viva	direct
31 Dec - 21 Jan	Viva
01 Dec - 14 Dec	Viva	direct
01 Dec - 12 Dec	Viva	direct
01 Dec - 07 Dec	Viva	direct
01 Dec - 08 Dec	Viva	direct
01 Dec - 10 Dec	Viva	direct
01 Dec - 15 Dec	Viva	direct
01 Dec - 06 Dec	Viva	direct
01 Dec - 05 Dec	Viva	direct
01 Dec - 02 Dec	Viva
07 Dec - 14 Dec	Viva
31 Dec - 13 Jan	Viva
31 Dec - 12 Jan	Viva
31 Dec - 12 Jan	Viva	direct
31 Dec - 09 Jan	Viva	direct
22 Dec - 02 Jan	Aeromexico
31 Dec - 07 Jan	Viva

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 $280

Return flights