AirHint found the following cheapest return flights from Seoul (ICN) to Chiang Mai (CNX) in November 2025 (see full year).

Return flights

11 Nov - 15 Nov	Thai AirAsia X
10 Nov - 15 Nov	Thai AirAsia X
07 Nov - 11 Nov	Thai AirAsia X
28 Nov - 03 Dec	HK Express
08 Nov - 13 Nov	HK Express
26 Nov - 28 Nov	AirAsia X
25 Nov - 04 Dec	VietJet Air
25 Nov - 02 Dec	VietJet Air
20 Nov - 26 Nov	HK Express
27 Nov - 05 Dec	VietJet Air
16 Nov - 27 Nov	VietJet Air
18 Nov - 21 Nov	HK Express
22 Nov - 26 Nov	HK Express
18 Nov - 22 Nov	HK Express
17 Nov - 06 Dec	HK Express
30 Nov - 03 Dec	VietJet Air
22 Nov - 02 Dec	VietJet Air
17 Nov - 05 Dec	HK Express
17 Nov - 12 Dec	HK Express
29 Nov - 06 Dec	HK Express

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

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 Seoul to Chiang Mai in November from $278

Return flights