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

Return flights

03 Dec - 10 Dec	Scoot
02 Dec - 09 Dec	VietJet Air
03 Dec - 08 Dec	Batik Air Malaysia
01 Dec - 08 Dec	AirAsia X
01 Dec - 10 Dec	Scoot
03 Dec - 13 Dec	Scoot
07 Dec - 14 Dec	Scoot
04 Dec - 14 Dec	Scoot
03 Dec - 12 Dec	Scoot
02 Dec - 31 Jan	VietJet Air
01 Dec - 15 Dec	AirAsia X
03 Dec - 23 Jan	Scoot
06 Dec - 23 Jan	Scoot
05 Dec - 31 Jan	Batik Air Malaysia
04 Dec - 10 Jan	Scoot
05 Dec - 23 Jan	Batik Air Malaysia
05 Dec - 07 Jan	Batik Air Malaysia
11 Dec - 11 Jan	Scoot
03 Dec - 09 Jan	Batik Air Malaysia
09 Dec - 11 Jan	Batik Air Malaysia

Also check the deals for one-way flights from Sydney to Dublin 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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Sydney to Dublin in December from $1014

Return flights