AirHint found the following cheapest return flights from Seoul (GMP) to Hanoi (HAN) in January 2026 (see full year).

Return flights

10 Jan - 13 Jan	Jeju Air
09 Jan - 14 Jan	Air Busan
14 Jan - 24 Jan	Jin Air
15 Jan - 22 Jan	Jeju Air
16 Jan - 19 Jan	Air Busan
13 Jan - 16 Jan	Air Busan
23 Jan - 27 Jan	Air Busan
21 Jan - 28 Jan	Air Busan
29 Jan - 05 Feb	Jin Air
21 Jan - 24 Jan	Air Busan
03 Jan - 06 Jan	Korean Air
20 Jan - 18 Feb	Air China
20 Jan - 19 Feb	Air China
19 Jan - 02 Feb	Air China
29 Jan - 09 Feb	Air China
29 Jan - 07 Feb	Air China
21 Jan - 19 Feb	Air China
21 Jan - 18 Feb	Air China
29 Jan - 03 Feb	Air China
30 Jan - 07 Feb	Korean Air

Also check the deals for one-way flights from Seoul to Hanoi in January.

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 Seoul to Hanoi in January from $196

Return flights