AirHint found the following cheapest return flights from Hat Yai (HDY) to Seoul (ICN) in December 2025 (see full year).

Return flights

07 Dec - 12 Dec	Thai AirAsia
01 Dec - 12 Dec	Thai AirAsia
07 Dec - 10 Dec	Thai AirAsia
16 Dec - 05 Jan	Thai AirAsia
01 Dec - 10 Dec	Thai AirAsia
16 Dec - 24 Dec	Thai AirAsia
14 Dec - 24 Dec	Thai AirAsia
07 Dec - 24 Dec	Thai AirAsia
16 Dec - 30 Dec	Thai AirAsia
31 Dec - 05 Jan	Thai AirAsia
14 Dec - 30 Dec	Thai AirAsia
27 Dec - 05 Jan	Thai AirAsia
27 Dec - 30 Dec	Thai AirAsia

Also check the deals for one-way flights from Hat Yai to Seoul in December.

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 Hat Yai to Seoul in December from $326

Return flights