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

Return flights

28 Oct - 05 Nov	Ryanair
27 Oct - 10 Nov	easyJet
23 Oct - 28 Oct	Ryanair
22 Oct - 29 Oct	Etihad Airways
31 Oct - 06 Nov	Wizz Air Malta
29 Oct - 10 Nov	Ryanair
31 Oct - 08 Nov	Wizz Air Malta
21 Oct - 31 Oct	Vueling Airlines
20 Oct - 23 Nov	Vueling Airlines
31 Oct - 02 Nov	easyJet
15 Oct - 26 Oct	easyJet
23 Oct - 01 Nov	Ryanair
15 Oct - 29 Oct	easyJet
30 Oct - 30 Nov	easyJet
18 Oct - 16 Nov	Wizz Air Malta
13 Oct - 20 Oct	easyJet
17 Oct - 26 Oct	Ryanair
12 Oct - 17 Oct	easyJet
03 Oct - 26 Oct	easyJet
01 Oct - 10 Oct	easyJet

Also check the deals for one-way flights from Lisbon to Sydney 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 Lisbon to Sydney in October from $1001

Return flights