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

Return flights

10 Oct - 24 Oct	HK Express
30 Oct - 04 Nov	Korean Air
01 Oct - 15 Oct	Jeju Air
03 Oct - 12 Oct	Air China
03 Oct - 09 Oct	Air China
05 Oct - 10 Oct	Jeju Air
03 Oct - 08 Oct	Korean Air
02 Oct - 07 Oct	Korean Air
02 Oct - 09 Oct	Korean Air
02 Oct - 10 Oct	Korean Air
03 Oct - 10 Oct	Korean Air

Also check the deals for one-way flights from Cheju to Hanoi 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 Cheju to Hanoi in October from 269€

Return flights