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

Return flights

10 Dec - 17 Dec	Scoot
05 Dec - 31 Jan	AirAsia X
09 Dec - 16 Dec	Scoot
06 Dec - 16 Dec	AirAsia X
10 Dec - 18 Dec	Scoot
08 Dec - 16 Dec	Scoot
10 Dec - 29 Dec	Scoot
05 Dec - 13 Dec	AirAsia X
05 Dec - 12 Dec	AirAsia X
06 Dec - 13 Dec	AirAsia X
10 Dec - 27 Dec	Scoot
10 Dec - 01 Jan	Scoot
14 Dec - 01 Jan	AirAsia X
11 Dec - 01 Jan	Scoot
29 Dec - 18 Jan	AirAsia X
31 Dec - 21 Jan	China Eastern
13 Dec - 01 Jan	AirAsia X
11 Dec - 04 Jan	Scoot
10 Dec - 02 Jan	Scoot
14 Dec - 09 Jan	AirAsia X

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 1018€

Return flights