Cheapest return flights from Lisbon to Sydney in December from $1293

Best time to book flights for Lisbon (LIS) to Sydney (SYD) flights at AirHint

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

Return flights

11 Dec - 09 Jan Air Serbia
23 Dec - 13 Jan Aegean Airlines
18 Dec - 08 Jan Ryanair
16 Dec - 06 Jan Aegean Airlines
12 Dec - 09 Jan Aegean Airlines
11 Dec - 10 Jan Ryanair
26 Dec - 21 Jan Aegean Airlines
19 Dec - 10 Jan Aegean Airlines
26 Dec - 09 Jan Vueling Airlines
22 Dec - 04 Jan Aegean Airlines
01 Dec - 16 Dec British Airways

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

Skyscanner

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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