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

Return flights

31 Aug - 04 Sep	Jeju Air
03 Aug - 06 Aug	Jeju Air
15 Aug - 22 Aug	Korean Air
02 Aug - 08 Aug	Jeju Air
24 Aug - 05 Sep	Jeju Air
01 Aug - 03 Aug	Jeju Air
02 Aug - 06 Aug	Jeju Air
01 Aug - 04 Aug	Jeju Air
01 Aug - 06 Aug	Jeju Air
17 Aug - 21 Aug	Jeju Air
01 Aug - 10 Aug	Jeju Air
02 Aug - 05 Aug	Jeju Air
25 Aug - 01 Sep	Air China
28 Aug - 02 Sep	Air China

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

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.

Book a cheap hotel in Hanoi

Cheap car rent in Hanoi

Cheapest return flights from Seoul to Hanoi in August from 383€

Return flights