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

Return flights

09 Dec - 16 Dec	AirAsia X
06 Dec - 13 Dec	Hainan Airlines
26 Dec - 23 Jan	Air China
10 Dec - 07 Jan	Scoot
28 Dec - 20 Jan	Hainan Airlines
12 Dec - 15 Jan	AirAsia X
09 Dec - 15 Jan	AirAsia X
08 Dec - 11 Jan	Scoot
28 Dec - 10 Jan	Hainan Airlines
28 Dec - 11 Jan	Hainan Airlines
23 Dec - 31 Dec	Hainan Airlines
07 Dec - 12 Jan	Air China
08 Dec - 12 Jan	Scoot
08 Dec - 15 Dec	Air France
07 Dec - 15 Dec	Qatar Airways
15 Dec - 29 Dec	Air France
17 Dec - 23 Dec	Qatar Airways
11 Dec - 19 Dec	Emirates
15 Dec - 15 Dec	Emirates
23 Dec - 27 Dec	Qantas

Also check the deals for one-way flights from Sydney to Lisbon 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 Lisbon in December from 1261€

Return flights