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

Return flights

05 Sep - 22 Sep	Aeromexico
05 Sep - 21 Sep	Aeromexico
05 Sep - 17 Sep	Aeromexico
13 Sep - 24 Sep	Aeromexico
07 Sep - 22 Sep	Aeromexico
09 Sep - 24 Sep	Aeromexico
06 Sep - 21 Sep	Viva
18 Sep - 24 Sep	Aeromexico
02 Sep - 16 Sep	Aeromexico
07 Sep - 16 Sep	Aeromexico
28 Sep - 13 Oct	Aeromexico
23 Sep - 08 Oct	Aeromexico
23 Sep - 17 Oct	Aeromexico
28 Sep - 23 Oct	Aeromexico
20 Sep - 18 Oct	Viva
21 Sep - 16 Oct	Aeromexico
29 Sep - 21 Oct	Aeromexico
30 Sep - 14 Oct	Viva
01 Sep - 16 Oct	Aeromexico
23 Sep - 13 Oct	American Airlines

Also check the deals for one-way flights from Mexico City 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 Mexico City to Seoul in September from 894€

Return flights