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

Return flights

02 Sep - 16 Sep	Scoot Tigerair
21 Sep - 16 Oct	Scoot Tigerair
28 Sep - 23 Oct	Scoot Tigerair
01 Sep - 19 Sep	Air India
16 Sep - 23 Sep	Turkish Airlines
16 Sep - 21 Oct	Turkish Airlines
01 Sep - 22 Sep	Air India
01 Sep - 02 Oct	Scoot Tigerair
04 Sep - 18 Sep	Turkish Airlines
18 Sep - 25 Sep	Turkish Airlines
04 Sep - 11 Sep	Turkish Airlines
23 Sep - 20 Oct	Turkish Airlines
24 Sep - 13 Oct	Turkish Airlines
05 Sep - 15 Sep	Scoot Tigerair
19 Sep - 14 Oct	Turkish Airlines
12 Sep - 26 Sep	Etihad Airways
16 Sep - 21 Sep	Turkish Airlines
15 Sep - 19 Oct	Etihad Airways
24 Sep - 08 Oct	Turkish Airlines
03 Sep - 03 Oct	Turkish Airlines

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

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Sydney to Lisbon in September from 1017€

Return flights