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

Return flights

13 Aug - 20 Aug	Viva	direct
19 Aug - 07 Sep	Viva	direct
19 Aug - 02 Sep	Viva	direct
12 Aug - 23 Aug	Viva	direct
12 Aug - 25 Aug	Viva	direct
21 Aug - 24 Aug	Viva	direct
19 Aug - 24 Aug	Viva	direct
19 Aug - 23 Aug	Viva	direct
19 Aug - 25 Aug	Viva	direct
12 Aug - 24 Aug	Viva	direct
23 Aug - 07 Sep	Viva	direct
20 Aug - 07 Sep	Viva	direct
12 Aug - 21 Aug	Viva	direct
14 Aug - 02 Sep	Viva	direct
23 Aug - 02 Sep	Viva	direct
20 Aug - 02 Sep	Viva	direct
19 Aug - 21 Aug	Viva	direct
19 Aug - 08 Sep	Viva	direct
19 Aug - 04 Sep	Viva	direct
23 Aug - 08 Sep	Viva	direct

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

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 August from 204€

Return flights