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

Return flights

16 Sep - 22 Oct	Air China
23 Sep - 22 Oct	Air China
02 Sep - 09 Sep	Air China
02 Sep - 16 Sep	Air China
02 Sep - 24 Sep	Air China
17 Sep - 17 Oct	Sichuan Airlines
06 Sep - 27 Sep	Japan Airlines
24 Sep - 30 Sep	Scoot Tigerair
09 Sep - 16 Sep	Air China
09 Sep - 14 Sep	Air China
08 Sep - 15 Sep	Japan Airlines
16 Sep - 01 Oct	Air China
21 Sep - 28 Sep	Air China
11 Sep - 26 Sep	Air China
17 Sep - 12 Oct	Scoot Tigerair
10 Sep - 15 Oct	Turkish Airlines
25 Sep - 17 Oct	Etihad Airways
27 Sep - 18 Oct	Air China
26 Sep - 18 Oct	Etihad Airways
18 Sep - 13 Oct	Turkish Airlines

Also check the deals for one-way flights from Sydney to Madrid 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.

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Cheapest return flights from Sydney to Madrid in September from 787€

Return flights