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

Return flights

02 Oct - 15 Oct	Aeromexico
01 Oct - 11 Oct	United
30 Oct - 10 Nov	United
01 Oct - 12 Oct	United
04 Oct - 22 Oct	United
04 Oct - 21 Oct	United
22 Oct - 05 Nov	United
30 Oct - 09 Nov	United
21 Oct - 05 Nov	United
27 Oct - 03 Nov	United
05 Oct - 22 Oct	United
15 Oct - 21 Oct	United
02 Oct - 24 Oct	United
21 Oct - 24 Oct	United
15 Oct - 30 Oct	United
30 Oct - 27 Nov	United
03 Oct - 02 Nov	Alaska Airlines
19 Oct - 01 Nov	United
31 Oct - 16 Nov	United
30 Oct - 16 Nov	United

Also check the deals for one-way flights from Monterrey to Seoul in October.

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 October from $1142

Return flights