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

Return flights

05 Dec - 19 Jan	Wizz Air Malta
03 Dec - 28 Jan	easyJet
01 Dec - 07 Dec	easyJet
01 Dec - 08 Dec	Ryanair
16 Dec - 26 Jan	Ryanair
01 Dec - 10 Dec	Ryanair
01 Dec - 11 Dec	Ryanair
14 Dec - 16 Jan	Wizz Air Malta
16 Dec - 15 Jan	Etihad Airways
25 Dec - 10 Jan	Pegasus Airlines
16 Dec - 09 Jan	Ryanair
29 Dec - 12 Jan	Ryanair
22 Dec - 12 Jan	Ryanair
28 Dec - 20 Jan	Pegasus Airlines
06 Dec - 08 Dec	Iberia
01 Dec - 15 Dec	Ryanair
01 Dec - 12 Dec	Ryanair
10 Dec - 14 Dec	easyJet
20 Dec - 27 Dec	easyJet
05 Dec - 20 Dec	easyJet

Also check the deals for one-way flights from Lisbon 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 Lisbon to Sydney in December from 762€

Return flights