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

Return flights

30 Sep - 21 Oct	Viva
28 Sep - 23 Oct	Viva
24 Sep - 07 Oct	Viva
25 Sep - 11 Oct	Viva
23 Sep - 08 Oct	Viva
26 Sep - 11 Oct	Viva
25 Sep - 09 Oct	Viva
25 Sep - 19 Oct	Volaris
20 Sep - 17 Oct	Viva
19 Sep - 11 Oct	WestJet
19 Sep - 29 Sep	Viva
24 Sep - 30 Sep	Volaris
23 Sep - 30 Sep	Viva
19 Sep - 26 Sep	Viva
22 Sep - 30 Sep	Volaris
20 Sep - 22 Sep	Volaris
22 Sep - 29 Sep	Volaris
20 Sep - 29 Sep	Viva
21 Sep - 28 Sep	Volaris
19 Sep - 30 Sep	Air Canada

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 $926

Return flights