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

Return flights

01 Dec - 08 Dec	Jetstar
03 Dec - 04 Jan	Jetstar
04 Dec - 04 Jan	Jetstar
02 Dec - 30 Dec	Jetstar
02 Dec - 31 Dec	Jetstar
03 Dec - 31 Dec	Jetstar
01 Dec - 29 Dec	Jetstar
02 Dec - 29 Dec	Jetstar
10 Dec - 03 Jan	Jetstar
04 Dec - 01 Jan	Jetstar
10 Dec - 04 Jan	Jetstar
07 Dec - 03 Jan	Jetstar
10 Dec - 30 Dec	Jetstar
05 Dec - 12 Dec	Batik Air Malaysia
10 Dec - 29 Dec	Jetstar
01 Dec - 27 Dec	Jetstar
07 Dec - 12 Jan	Jetstar
10 Dec - 01 Jan	Jetstar
11 Dec - 12 Jan	Jetstar
15 Dec - 03 Jan	Jetstar

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 $1091

Return flights