AirHint found the following cheapest return flights from Hanoi (HAN) to Busan (PUS) in October 2025 (see full year).

Return flights

02 Oct - 13 Oct	VietJet Air
03 Oct - 13 Oct	VietJet Air
31 Oct - 04 Nov	VietJet Air
30 Oct - 04 Nov	VietJet Air
04 Oct - 07 Oct	VietJet Air
03 Oct - 07 Oct	VietJet Air
16 Oct - 21 Oct	VietJet Air
23 Oct - 30 Oct	VietJet Air
10 Oct - 13 Oct	VietJet Air
11 Oct - 13 Oct	VietJet Air
09 Oct - 19 Oct	VietJet Air
02 Oct - 13 Oct	Vietnam Airlines	direct
31 Oct - 04 Nov	Vietnam Airlines	direct
30 Oct - 04 Nov	Vietnam Airlines	direct

Also check the deals for one-way flights from Hanoi to Busan in October.

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 Busan in October from $179

Return flights