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

Return flights

18 Aug - 25 Aug	Aeromexico
07 Aug - 21 Aug	Aeromexico
11 Aug - 21 Aug	Aeromexico
05 Aug - 14 Aug	Aeromexico
14 Aug - 30 Aug	Aeromexico
17 Aug - 26 Aug	Aeromexico
17 Aug - 25 Aug	Aeromexico
01 Aug - 15 Aug	Aeromexico
03 Aug - 22 Aug	Aeromexico
29 Aug - 16 Sep	Alaska Airlines
30 Aug - 20 Sep	Korean Air

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 $1175

Return flights