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

Return flights

14 Aug - 18 Aug	Spirit Airlines
14 Aug - 21 Aug	Spirit Airlines
22 Aug - 27 Aug	Spirit Airlines
30 Aug - 05 Sep	Spirit Airlines
07 Aug - 14 Aug	Spirit Airlines
07 Aug - 17 Aug	Spirit Airlines
08 Aug - 17 Aug	Spirit Airlines
06 Aug - 16 Aug	Spirit Airlines
02 Aug - 08 Aug	Spirit Airlines
17 Aug - 22 Aug	Spirit Airlines
22 Aug - 30 Aug	Delta

Also check the deals for one-way flights from Newark 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 Newark to Monterrey in August from 333€

Return flights