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

Return flights

02 Oct - 13 Oct	Viva	direct
10 Oct - 13 Oct	Viva	direct
02 Oct - 19 Oct	Viva	direct
02 Oct - 22 Oct	Viva	direct
02 Oct - 12 Oct	Viva	direct
10 Oct - 19 Oct	Viva	direct
10 Oct - 22 Oct	Viva	direct
10 Oct - 12 Oct	Viva	direct
10 Oct - 24 Oct	Viva	direct
04 Oct - 13 Oct	Viva	direct
28 Oct - 05 Nov	Viva	direct
28 Oct - 10 Nov	Viva	direct
28 Oct - 09 Nov	Viva	direct
28 Oct - 12 Nov	Viva	direct
24 Oct - 05 Nov	Viva	direct
28 Oct - 17 Nov	Viva	direct
24 Oct - 10 Nov	Viva	direct
24 Oct - 09 Nov	Viva	direct
24 Oct - 12 Nov	Viva	direct
28 Oct - 18 Nov	Viva

Also check the deals for one-way flights from Chicago to Monterrey in October.

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 October from 194€

Return flights