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

Return flights

25 Aug - 28 Aug	Ryanair
24 Aug - 22 Sep	Etihad Airways
24 Aug - 21 Sep	Ryanair
19 Aug - 26 Aug	Ryanair
25 Aug - 20 Sep	Etihad Airways
20 Aug - 20 Sep	Etihad Airways
25 Aug - 07 Sep	IndiGo
19 Aug - 28 Aug	Ryanair
29 Aug - 10 Sep	Ryanair
16 Aug - 04 Sep	IndiGo
16 Aug - 05 Sep	IndiGo
16 Aug - 03 Sep	IndiGo
25 Aug - 22 Sep	Etihad Airways
13 Aug - 24 Aug	Ryanair
15 Aug - 18 Aug	IndiGo
11 Aug - 20 Aug	Aer Lingus
24 Aug - 31 Aug	IndiGo
18 Aug - 25 Aug	Lufthansa
25 Aug - 31 Aug	Ryanair
22 Aug - 31 Aug	Ryanair

Also check the deals for one-way flights from Dublin 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 Dublin to Hanoi in August from 643€

Return flights