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

Return flights

29 Sep - 21 Oct	VietJet Air
23 Sep - 19 Oct	VietJet Air
30 Sep - 15 Oct	Scoot
30 Sep - 14 Oct	Scoot
22 Sep - 29 Sep	VietJet Air
29 Sep - 15 Oct	VietJet Air
29 Sep - 14 Oct	VietJet Air
30 Sep - 16 Oct	Scoot
30 Sep - 07 Oct	AirAsia X
29 Sep - 16 Oct	VietJet Air
25 Sep - 19 Oct	AirAsia X
20 Sep - 27 Sep	AirAsia X
25 Sep - 28 Sep	VietJet Air
19 Sep - 29 Sep	AirAsia X
19 Sep - 27 Sep	Etihad Airways
21 Sep - 30 Sep	Turkish Airlines
21 Sep - 29 Sep	Etihad Airways
20 Sep - 30 Sep	Emirates

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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from Sydney to Madrid in September from $1231

Return flights