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

Return flights

18 Aug - 23 Aug	VietJet Air	direct
16 Aug - 23 Aug	VietJet Air	direct
13 Aug - 17 Aug	VietJet Air	direct
12 Aug - 17 Aug	VietJet Air	direct
01 Aug - 09 Aug	VietJet Air	direct
15 Aug - 22 Aug	VietJet Air	direct
01 Aug - 10 Aug	VietJet Air	direct
24 Aug - 07 Sep	Vietnam Airlines	direct
29 Aug - 12 Sep	Vietnam Airlines	direct
24 Aug - 25 Aug	VietJet Air
19 Aug - 25 Aug	VietJet Air
20 Aug - 24 Aug	VietJet Air

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.

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Cheapest return flights from Seoul to Hanoi in August from $159

Return flights