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

Return flights

05 Dec - 10 Dec	China Southern
01 Dec - 05 Dec	Ryanair
09 Dec - 10 Jan	Ryanair
05 Dec - 07 Dec	China Southern
09 Dec - 09 Jan	Ryanair
11 Dec - 10 Jan	Ryanair
12 Dec - 10 Jan	China Southern
10 Dec - 10 Jan	easyJet
15 Dec - 11 Jan	Ryanair
10 Dec - 09 Jan	easyJet
18 Dec - 25 Dec	Luxair
22 Dec - 05 Jan	Luxair
19 Dec - 31 Dec	China Southern
21 Dec - 05 Jan	Ryanair
19 Dec - 05 Jan	Ryanair
01 Dec - 28 Dec	British Airways
04 Dec - 11 Dec	Condor

Also check the deals for one-way flights from Luxemburg to Sydney 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 Luxemburg to Sydney in December from $1133

Return flights