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

Return flights

30 Oct - 05 Nov	Turkish Airlines
24 Oct - 31 Oct	Turkish Airlines
07 Oct - 15 Oct	Turkish Airlines
08 Oct - 15 Oct	Turkish Airlines
14 Oct - 21 Oct	Turkish Airlines
25 Oct - 07 Nov	Air Canada
19 Oct - 03 Nov	Air Canada
01 Oct - 01 Nov	Turkish Airlines
03 Oct - 31 Oct	Turkish Airlines
01 Oct - 31 Oct	Turkish Airlines
06 Oct - 12 Oct	Air Canada
06 Oct - 15 Oct	Air Canada
14 Oct - 24 Oct	Turkish Airlines
20 Oct - 04 Nov	British Airways
28 Oct - 10 Nov	Etihad Airways
31 Oct - 28 Nov	Air Canada
06 Oct - 13 Oct	Etihad Airways
06 Oct - 06 Nov	Etihad Airways
07 Oct - 04 Nov	Emirates

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

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 October from $1054

Return flights