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

Return flights

07 Dec - 14 Dec	Scoot
08 Dec - 15 Dec	Scoot
10 Dec - 21 Dec	Virgin Australia
08 Dec - 30 Dec	Scoot
05 Dec - 18 Dec	Jetstar
25 Dec - 23 Jan	Hainan Airlines
05 Dec - 15 Jan	Jetstar
05 Dec - 19 Dec	Jetstar
23 Dec - 30 Jan	Hainan Airlines
16 Dec - 23 Dec	Air China
12 Dec - 28 Dec	Jetstar
17 Dec - 31 Dec	Jetstar
14 Dec - 14 Jan	Hainan Airlines
22 Dec - 29 Dec	Scoot
13 Dec - 12 Jan	AirAsia X
16 Dec - 06 Jan	Air China
14 Dec - 03 Jan	Scoot
18 Dec - 08 Jan	Jetstar
25 Dec - 02 Jan	Hainan Airlines
26 Dec - 05 Jan	AirAsia X

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 1045€

Return flights