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 - 15 Oct	Air China
09 Sep - 21 Oct	Air China
20 Sep - 21 Oct	Air China
16 Sep - 23 Oct	Air China
06 Sep - 13 Sep	Air China
10 Sep - 21 Sep	Sichuan Airlines
30 Sep - 30 Oct	Air China
12 Sep - 17 Sep	VietJet Air
01 Sep - 08 Sep	Japan Airlines
09 Sep - 16 Sep	Air China
09 Sep - 02 Oct	Air China
23 Sep - 30 Sep	Turkish Airlines
09 Sep - 30 Sep	Turkish Airlines
04 Sep - 12 Sep	Scoot Tigerair
11 Sep - 22 Sep	Turkish Airlines
15 Sep - 02 Oct	Scoot Tigerair
17 Sep - 22 Oct	Turkish Airlines
21 Sep - 28 Sep	Etihad Airways
16 Sep - 06 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 $890

Return flights