Cheapest return flights from Seoul to Chiang Mai in May from $269

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

Return flights

14 May - 18 May AirAsia X
14 May - 26 May AirAsia X
07 May - 18 May AirAsia X
07 May - 11 May AirAsia X
07 May - 26 May AirAsia X
31 May - 04 Jun Malaysia Airlines
21 May - 31 May Malaysia Airlines
23 May - 26 May Malaysia Airlines
22 May - 26 May Malaysia Airlines
25 May - 26 May Thai AirAsia X
19 May - 26 May Thai AirAsia X
26 May - 14 Jun Thai AirAsia X
25 May - 14 Jun Thai AirAsia X
27 May - 14 Jun Thai AirAsia X
14 May - 01 Jun AirAsia X
30 May - 04 Jun Malaysia Airlines
26 May - 06 Jun Thai AirAsia X
26 May - 01 Jun Thai AirAsia X
25 May - 06 Jun Thai AirAsia X
25 May - 01 Jun Thai AirAsia X

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

Skyscanner

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.

Book a cheap hotel in Chiang Mai

Cheap car rent in Chiang Mai

Feel free to contact us with any feedback or request another flight research.