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

Return flights

29 Aug - 05 Sep	Volaris
18 Aug - 25 Aug	Viva
11 Aug - 25 Aug	Aeromexico
14 Aug - 25 Aug	Aeromexico
26 Aug - 02 Sep	Alaska Airlines
22 Aug - 29 Aug	Viva
22 Aug - 26 Aug	Viva
13 Aug - 27 Aug	Alaska Airlines
14 Aug - 27 Aug	Viva
21 Aug - 31 Aug	Viva
11 Aug - 26 Aug	Alaska Airlines
09 Aug - 30 Aug	Viva
29 Aug - 16 Sep	Alaska Airlines

Also check the deals for one-way flights from Monterrey to Seoul 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 Monterrey to Seoul in August from 975€

Return flights