AirHint found the following cheapest one-way flights from Hanoi (HAN) to Seoul (ICN) in December 2025 (see full year).

One-Way flights

22 Dec	VietJet Air	direct
01 Dec	VietJet Air	direct
15 Dec	VietJet Air	direct
02 Dec	VietJet Air	direct
21 Dec	VietJet Air	direct
16 Dec	HK Express
04 Dec	HK Express
13 Dec	HK Express
05 Dec	HK Express
14 Dec	HK Express

Also check the deals for return flights from Hanoi 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 one-way flights from Hanoi to Seoul in December from $101

One-Way flights