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

Return flights

03 Mar - 08 Mar	Eastar Jet
03 Mar - 15 Mar	Eastar Jet
13 Mar - 15 Mar	Eastar Jet
10 Mar - 15 Mar	Eastar Jet
06 Mar - 08 Mar	Eastar Jet
06 Mar - 15 Mar	Eastar Jet
12 Mar - 15 Mar	Eastar Jet
30 Mar - 17 Apr	Thai AirAsia
03 Mar - 10 Mar	Eastar Jet
03 Mar - 13 Mar	Eastar Jet
03 Mar - 07 Mar	Eastar Jet
27 Mar - 17 Apr	Eastar Jet
28 Mar - 17 Apr	Thai AirAsia
29 Mar - 17 Apr	Thai AirAsia
30 Mar - 02 Apr	Thai AirAsia
30 Mar - 01 Apr	Thai AirAsia
25 Mar - 02 Apr	Eastar Jet
25 Mar - 01 Apr	Eastar Jet
20 Mar - 02 Apr	Eastar Jet
20 Mar - 01 Apr	Eastar Jet

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

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 March from 251€

Return flights