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

Return flights

01 May - 09 May	Vietnam Airlines
09 May - 14 May	Vietnam Airlines
01 May - 09 May	Asiana Airlines	direct
09 May - 14 May	Asiana Airlines	direct
12 May - 20 May	AirAsia
19 May - 20 May	AirAsia
07 May - 11 May	AirAsia
11 May - 20 May	AirAsia
07 May - 20 May	AirAsia
12 May - 29 May	AirAsia
25 May - 12 Jun	AirAsia
28 May - 17 Jun	AirAsia
28 May - 15 Jun	AirAsia
28 May - 12 Jun	AirAsia

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

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 May from $283

Return flights