AirHint found the following cheapest return flights from Chiang Mai (CNX) to Seoul (ICN) in January 2026 (see full year).

Return flights

27 Jan - 03 Feb	Bangkok Airways
12 Jan - 20 Jan	Cebu Pacific
30 Jan - 03 Feb	HK Express
21 Jan - 28 Jan	HK Express
09 Jan - 19 Jan	HK Express
14 Jan - 27 Jan	HK Express
13 Jan - 26 Jan	HK Express
29 Jan - 07 Feb	HK Express
08 Jan - 26 Jan	Eastar Jet	direct
29 Jan - 02 Feb	Thai AirAsia
29 Jan - 09 Feb	Thai AirAsia
22 Jan - 02 Feb	Thai AirAsia
22 Jan - 09 Feb	Thai AirAsia
28 Jan - 02 Feb	Thai AirAsia
28 Jan - 09 Feb	Thai AirAsia
22 Jan - 26 Jan	Thai AirAsia
09 Jan - 26 Jan	Jin Air	direct
14 Jan - 02 Feb	Eastar Jet	direct
02 Jan - 07 Jan	China Airlines
10 Jan - 26 Jan	Thai AirAsia

Also check the deals for one-way flights from Chiang Mai to Seoul in January.

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 Chiang Mai to Seoul in January from 321€

Return flights