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

Return flights

02 Oct - 14 Oct	Eastar Jet	direct
02 Oct - 12 Oct	Eastar Jet	direct
02 Oct - 11 Oct	Eastar Jet
02 Oct - 15 Oct	Eastar Jet
02 Oct - 13 Oct	Eastar Jet
02 Oct - 11 Oct	Eastar Jet	direct
02 Oct - 15 Oct	Eastar Jet	direct
02 Oct - 16 Oct	Eastar Jet	direct
02 Oct - 22 Oct	Eastar Jet	direct
02 Oct - 10 Oct	Eastar Jet	direct
19 Oct - 13 Nov	HK Express
31 Oct - 06 Nov	Nok Air
30 Oct - 11 Nov	Jin Air
30 Oct - 17 Nov	Jin Air
23 Oct - 11 Nov	Eastar Jet
30 Oct - 12 Nov	Jin Air
30 Oct - 16 Nov	Jin Air
31 Oct - 11 Nov	Thai AirAsia
28 Oct - 11 Nov	Thai AirAsia
29 Oct - 11 Nov	Thai AirAsia

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

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 Seoul

Cheap car rent in Seoul

Cheapest return flights from Chiang Mai to Seoul in October from 202€

Return flights