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

Return flights

29 Dec - 14 Jan	Turkish Airlines
05 Dec - 14 Dec	Turkish Airlines
28 Dec - 02 Jan	Ryanair
27 Dec - 03 Jan	easyJet
29 Dec - 02 Jan	easyJet
28 Dec - 31 Jan	Turkish Airlines
26 Dec - 02 Jan	easyJet
29 Dec - 16 Jan	Turkish Airlines
09 Dec - 31 Jan	Turkish Airlines
01 Dec - 08 Dec	Air Canada
11 Dec - 25 Dec	Turkish Airlines
01 Dec - 07 Dec	Turkish Airlines
07 Dec - 28 Dec	Turkish Airlines
31 Dec - 24 Jan	Turkish Airlines
16 Dec - 31 Jan	Turkish Airlines
01 Dec - 22 Dec	Etihad Airways
15 Dec - 22 Dec	Etihad Airways
01 Dec - 19 Dec	Etihad Airways
14 Dec - 21 Dec	Turkish Airlines
11 Dec - 18 Dec	Turkish Airlines

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 $1406

Return flights