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

Return flights

06 Dec - 13 Dec	Jetstar
29 Dec - 28 Jan	Turkish Airlines
02 Dec - 15 Dec	Turkish Airlines
07 Dec - 16 Dec	Turkish Airlines
27 Dec - 03 Jan	Turkish Airlines
06 Dec - 11 Jan	Turkish Airlines
26 Dec - 03 Jan	Turkish Airlines
22 Dec - 29 Dec	Turkish Airlines
07 Dec - 07 Dec	Emirates
22 Dec - 19 Jan	Air France
13 Dec - 20 Dec	Emirates
20 Dec - 03 Jan	Turkish Airlines
19 Dec - 06 Jan	Thai Airways

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 $1313

Return flights