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

Return flights

19 Sep - 03 Oct	Ryanair
19 Sep - 26 Sep	Aer Lingus
03 Sep - 16 Sep	Qatar Airways
22 Sep - 29 Sep	Ryanair
15 Sep - 27 Sep	Ryanair
08 Sep - 15 Sep	Qatar Airways
22 Sep - 01 Oct	Aer Lingus
12 Sep - 03 Oct	Aer Lingus
01 Sep - 14 Sep	Vueling Airlines
01 Sep - 24 Sep	Ryanair
26 Sep - 04 Oct	Ryanair
03 Sep - 10 Sep	Ryanair
17 Sep - 01 Oct	Ryanair
07 Sep - 18 Oct	Aer Lingus
03 Sep - 14 Sep	Ryanair
22 Sep - 05 Oct	Ryanair
05 Sep - 21 Sep	Ryanair
07 Sep - 19 Oct	Aer Lingus
14 Sep - 18 Oct	Aer Lingus
09 Sep - 07 Oct	Aer Lingus

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

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 September from 600€

Return flights