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

Return flights

10 Dec - 20 Dec	VietJet Air
03 Dec - 10 Dec	VietJet Air
03 Dec - 07 Dec	VietJet Air
18 Dec - 21 Dec	VietJet Air
03 Dec - 23 Dec	VietJet Air
05 Dec - 09 Dec	VietJet Air
04 Dec - 23 Dec	VietJet Air
18 Dec - 20 Dec	VietJet Air
16 Dec - 20 Dec	VietJet Air
04 Dec - 11 Dec	VietJet Air
26 Dec - 03 Jan	VietJet Air
31 Dec - 16 Jan	T'way Air
13 Dec - 03 Jan	VietJet Air
24 Dec - 02 Jan	VietJet Air
20 Dec - 02 Jan	VietJet Air
22 Dec - 02 Jan	VietJet Air
19 Dec - 09 Jan	VietJet Air
23 Dec - 02 Jan	VietJet Air
26 Dec - 04 Jan	VietJet Air
30 Dec - 04 Jan	T'way Air	direct

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 $205

Return flights