AirHint found the following cheapest return flights from Dublin (DUB) to Hanoi (HAN) in December 2025 (see full year).

Return flights

01 Dec - 08 Dec	Ryanair
02 Dec - 15 Jan	Ryanair
01 Dec - 11 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
04 Dec - 29 Dec	Ryanair
03 Dec - 18 Dec	Ryanair
08 Dec - 22 Dec	Ryanair
08 Dec - 23 Dec	Ryanair
14 Dec - 28 Jan	Ryanair
31 Dec - 28 Jan	Ryanair
02 Dec - 30 Jan	Ryanair
09 Dec - 27 Dec	Ryanair
07 Dec - 19 Dec	Ryanair
13 Dec - 24 Jan	Ryanair
05 Dec - 12 Dec	Ryanair
31 Dec - 20 Jan	Ryanair
30 Dec - 20 Jan	Hainan Airlines
31 Dec - 18 Jan	Ryanair
30 Dec - 12 Jan	Hainan Airlines
03 Dec - 11 Jan	Ryanair

Also check the deals for one-way flights from Dublin to Hanoi in December.

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 Dublin to Hanoi in December from $647

Return flights