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

Return flights

10 Mar - 17 Mar	Korean Air
19 Mar - 23 Mar	Air China
12 Mar - 15 Mar	T'way Air
17 Mar - 22 Mar	Korean Air
20 Mar - 22 Mar	Air Busan
19 Mar - 26 Mar	Korean Air
10 Mar - 18 Mar	Air China
10 Mar - 12 Mar	Air China
26 Mar - 29 Mar	T'way Air
28 Mar - 06 Apr	Air Busan
25 Mar - 30 Mar	Air China
30 Mar - 02 Apr	Korean Air
21 Mar - 01 Apr	Air China
27 Mar - 01 Apr	Air China
13 Mar - 05 Apr	Air China
28 Mar - 01 Apr	Air China
31 Mar - 04 Apr	Air China
25 Mar - 04 Apr	Air China
23 Mar - 04 Apr	Air China
13 Mar - 04 Apr	Air China

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

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 March from $294

Return flights