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

Return flights

28 Jul - 13 Aug	Viva
29 Jul - 13 Aug	Viva
29 Jul - 19 Aug	Viva
31 Jul - 20 Aug	Viva	direct
28 Jul - 17 Aug	Viva
29 Jul - 17 Aug	Viva
29 Jul - 18 Aug	Viva
29 Jul - 13 Aug	Viva	direct
31 Jul - 19 Aug	Viva	direct
31 Jul - 13 Aug	Viva	direct
29 Jul - 31 Jul	Viva
28 Jul - 29 Jul	Viva
28 Jul - 30 Jul	Viva
29 Jul - 30 Jul	Viva
31 Jul - 31 Jul	Viva
29 Jul - 29 Jul	Viva
27 Jul - 29 Jul	Viva
28 Jul - 29 Jul	Viva	direct
27 Jul - 29 Jul	Viva	direct
29 Jul - 30 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 325€

Return flights