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

Return flights

29 Oct - 05 Nov	Qantas
21 Oct - 26 Nov	Air Canada
20 Oct - 17 Nov	Air Canada
07 Oct - 04 Nov	Etihad Airways
14 Oct - 19 Oct	Scoot
19 Oct - 03 Nov	Turkish Airlines
08 Oct - 25 Oct	Turkish Airlines
15 Oct - 30 Oct	Turkish Airlines
16 Oct - 27 Nov	Turkish Airlines
05 Oct - 19 Oct	Scoot
27 Oct - 15 Nov	Etihad Airways
15 Oct - 01 Nov	Etihad Airways
08 Oct - 18 Oct	AirAsia X
02 Oct - 16 Oct	Turkish Airlines
02 Oct - 07 Oct	AirAsia X
01 Oct - 13 Oct	China Eastern
05 Oct - 10 Oct	Scoot
03 Oct - 10 Oct	Scoot
27 Oct - 11 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 $956

Return flights