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
01 Dec - 08 Dec	Jetstar
01 Dec - 10 Dec	Batik Air Malaysia
04 Dec - 11 Dec	Scoot
02 Dec - 31 Jan	Jetstar
01 Dec - 14 Dec	VietJet Air
01 Dec - 15 Dec	VietJet Air
07 Dec - 14 Dec	Scoot
02 Dec - 12 Dec	Jetstar
02 Dec - 16 Dec	Jetstar
05 Dec - 31 Jan	Batik Air Malaysia
03 Dec - 30 Dec	Scoot
05 Dec - 06 Jan	Batik Air Malaysia
05 Dec - 23 Jan	Batik Air Malaysia
07 Dec - 03 Jan	Batik Air Malaysia
05 Dec - 18 Jan	Batik Air Malaysia
05 Dec - 07 Jan	Batik Air Malaysia
09 Dec - 09 Jan	Virgin Australia
31 Dec - 07 Jan	Sichuan Airlines
06 Dec - 23 Jan	Virgin Australia

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.

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Cheapest return flights from Sydney to Dublin in December from 885€

Return flights