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

Return flights

01 Sep - 13 Sep	Scoot Tigerair
13 Sep - 19 Sep	AirAsia X
02 Sep - 23 Sep	Scoot Tigerair
02 Sep - 14 Sep	Scoot Tigerair
01 Sep - 30 Sep	Scoot Tigerair
05 Sep - 27 Sep	AirAsia X
03 Sep - 12 Sep	AirAsia X
10 Sep - 22 Sep	AirAsia X
10 Sep - 26 Sep	AirAsia X
10 Sep - 12 Sep	AirAsia X
28 Sep - 15 Oct	AirAsia X
30 Sep - 15 Oct	AirAsia X
30 Sep - 20 Oct	AirAsia X
25 Sep - 15 Oct	AirAsia X
25 Sep - 20 Oct	AirAsia X
28 Sep - 08 Oct	AirAsia X
30 Sep - 08 Oct	AirAsia X
23 Sep - 08 Oct	AirAsia X
24 Sep - 08 Oct	AirAsia X
25 Sep - 08 Oct	AirAsia X

Also check the deals for one-way flights from Sydney to Karachi 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 Karachi in September from $798

Return flights