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

Return flights

07 Mar - 26 Mar	Eastar Jet	direct
09 Mar - 26 Mar	Eastar Jet	direct
07 Mar - 08 Mar	Eastar Jet
07 Mar - 12 Mar	Eastar Jet
09 Mar - 12 Mar	Eastar Jet
09 Mar - 16 Mar	Eastar Jet
07 Mar - 16 Mar	Eastar Jet
07 Mar - 09 Mar	Eastar Jet
09 Mar - 14 Mar	Eastar Jet
07 Mar - 10 Mar	Eastar Jet
26 Mar - 16 Apr	Eastar Jet
27 Mar - 16 Apr	Eastar Jet
29 Mar - 16 Apr	Thai AirAsia
28 Mar - 16 Apr	Thai AirAsia
25 Mar - 01 Apr	Eastar Jet
26 Mar - 01 Apr	Eastar Jet
18 Mar - 01 Apr	Eastar Jet
24 Mar - 01 Apr	Eastar Jet
27 Mar - 01 Apr	Eastar Jet
12 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 169€

Return flights