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

Return flights

27 Dec - 10 Jan	VietJet Air	direct
24 Dec - 02 Jan	VietJet Air	direct
07 Dec - 14 Dec	VietJet Air
09 Dec - 14 Dec	HK Express
10 Dec - 14 Dec	VietJet Air
16 Dec - 19 Dec	VietJet Air
11 Dec - 16 Dec	VietJet Air
05 Dec - 08 Dec	VietJet Air
05 Dec - 06 Dec	VietJet Air
12 Dec - 16 Dec	VietJet Air
05 Dec - 09 Dec	VietJet Air
21 Dec - 26 Dec	VietJet Air
27 Dec - 03 Jan	VietJet Air
31 Dec - 05 Jan	VietJet Air
28 Dec - 03 Jan	China Southern
27 Dec - 03 Jan	Jeju Air	direct
31 Dec - 05 Jan	Jeju Air	direct
30 Dec - 14 Jan	AirAsia
30 Dec - 16 Jan	AirAsia
27 Dec - 14 Jan	AirAsia

Also check the deals for one-way 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 return flights from Hanoi to Seoul in December from $172

Return flights