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

Return flights

16 Apr - 19 Apr	Korean Air
16 Apr - 23 Apr	Korean Air
21 Apr - 23 Apr	Jeju Air
16 Apr - 21 Apr	Jeju Air
11 Apr - 14 Apr	Jeju Air
11 Apr - 15 Apr	Jeju Air
18 Apr - 23 Apr	Jeju Air
09 Apr - 13 Apr	Jeju Air
24 Apr - 02 May	Korean Air
10 Apr - 15 Apr	Jeju Air
21 Apr - 26 Apr	Air China
29 Apr - 06 May	Air China
29 Apr - 11 May	Air China
30 Apr - 06 May	Air China
29 Apr - 05 May	Air China
23 Apr - 05 May	Air China
22 Apr - 01 May	Jeju Air
30 Apr - 07 May	Air China
30 Apr - 09 May	Air China
30 Apr - 10 May	Air China

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

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 April from 310€

Return flights