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

Return flights

09 Sep - 24 Sep	WestJet
10 Sep - 23 Sep	WestJet
19 Sep - 24 Sep	WestJet
29 Sep - 13 Oct	Volaris
29 Sep - 09 Oct	Volaris
24 Sep - 27 Sep	WestJet
01 Sep - 16 Sep	Volaris
01 Sep - 30 Sep	United
11 Sep - 26 Sep	United
16 Sep - 30 Sep	United
17 Sep - 21 Oct	United
24 Sep - 22 Oct	United
15 Sep - 02 Oct	United

Also check the deals for one-way flights from Cancun 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 Cancun to Seoul in September from 836€

Return flights