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

Return flights

28 Jul - 14 Aug	Viva	direct
28 Jul - 08 Aug	Viva	direct
25 Jul - 29 Jul	American Airlines
22 Jul - 29 Jul	Aeromexico
19 Jul - 08 Aug	Viva	direct
20 Jul - 08 Aug	Viva	direct
28 Jul - 13 Aug	Viva	direct
28 Jul - 10 Aug	Viva	direct
21 Jul - 08 Aug	Viva	direct
25 Jul - 14 Aug	Viva	direct
25 Jul - 08 Aug	Viva	direct
25 Jul - 01 Aug	American Airlines
28 Jul - 29 Jul	Viva	direct
19 Jul - 26 Jul	Viva	direct
20 Jul - 27 Jul	Viva
28 Jul - 31 Jul	Viva	direct
25 Jul - 29 Jul	United	direct
19 Jul - 29 Jul	Viva	direct
20 Jul - 29 Jul	Viva	direct
19 Jul - 23 Jul	Viva	direct

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

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 July from $331

Return flights