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

Return flights

28 Oct - 04 Nov	China Eastern
22 Oct - 29 Oct	Qantas
06 Oct - 28 Oct	Etihad Airways
07 Oct - 04 Nov	Etihad Airways
08 Oct - 25 Oct	Turkish Airlines
07 Oct - 22 Oct	Turkish Airlines
09 Oct - 28 Oct	Turkish Airlines
12 Oct - 27 Oct	Turkish Airlines
06 Oct - 20 Oct	Air India
08 Oct - 15 Oct	VietJet Air
13 Oct - 28 Oct	British Airways
08 Oct - 18 Oct	VietJet Air
16 Oct - 06 Nov	Emirates
14 Oct - 04 Nov	Emirates
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 777€

Return flights