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

Return flights

11 Sep - 22 Sep	Hawaiian Airlines
25 Sep - 06 Oct	Hawaiian Airlines
11 Sep - 25 Sep	Hawaiian Airlines
11 Sep - 20 Sep	Hawaiian Airlines
19 Sep - 27 Sep	Hawaiian Airlines
20 Sep - 27 Sep	Hawaiian Airlines
13 Sep - 22 Sep	Hawaiian Airlines
16 Sep - 24 Sep	Hawaiian Airlines
16 Sep - 23 Sep	Hawaiian Airlines
12 Sep - 19 Sep	Hawaiian Airlines
25 Sep - 09 Oct	Hawaiian Airlines
13 Sep - 27 Sep	Hawaiian Airlines
29 Sep - 06 Oct	Aeromexico
02 Sep - 01 Oct	Aeromexico
26 Sep - 10 Oct	United
29 Sep - 29 Oct	United
13 Sep - 30 Oct	United
28 Sep - 29 Oct	United
26 Sep - 06 Oct	United
25 Sep - 13 Oct	Aeromexico

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

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 September from $685

Return flights