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

Return flights

15 Oct - 30 Oct	Ryanair
15 Oct - 02 Nov	Ryanair
20 Oct - 09 Nov	Iberia
31 Oct - 09 Nov	Sichuan Airlines
27 Oct - 09 Nov	Sichuan Airlines
20 Oct - 26 Oct	Iberia
19 Oct - 26 Oct	Sichuan Airlines
21 Oct - 02 Nov	SWISS
01 Oct - 09 Nov	Ryanair
27 Oct - 03 Nov	Ryanair
20 Oct - 03 Nov	Iberia
01 Oct - 15 Oct	Ryanair
08 Oct - 26 Oct	Ryanair
30 Oct - 15 Nov	SWISS
14 Oct - 30 Oct	Ryanair
03 Oct - 25 Oct	Ryanair
01 Oct - 07 Oct	Ryanair
16 Oct - 26 Oct	Air China
18 Oct - 04 Nov	Finnair
08 Oct - 24 Oct	Ryanair

Also check the deals for one-way flights from Madrid 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 Madrid to Sydney in October from $1027

Return flights