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

Return flights

08 Dec - 16 Jan	easyJet
30 Dec - 24 Jan	easyJet
29 Dec - 21 Jan	British Airways
30 Dec - 13 Jan	British Airways
07 Dec - 14 Dec	easyJet
31 Dec - 28 Jan	easyJet
31 Dec - 14 Jan	easyJet
06 Dec - 30 Dec	Ryanair
04 Dec - 11 Dec	easyJet
26 Dec - 17 Jan	easyJet
03 Dec - 07 Jan	easyJet
04 Dec - 11 Jan	easyJet
30 Dec - 12 Jan	easyJet
06 Dec - 13 Dec	Ryanair
01 Dec - 15 Dec	Wizz Air Malta
08 Dec - 15 Dec	Wizz Air Malta
09 Dec - 16 Dec	easyJet
10 Dec - 17 Dec	easyJet
17 Dec - 24 Dec	easyJet
23 Dec - 30 Dec	Ryanair

Also check the deals for one-way flights from Glasgow 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 Glasgow to Sydney in December from 782€

Return flights