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

Return flights

02 Dec - 05 Dec	AirAsia X
02 Dec - 14 Dec	AirAsia X
06 Dec - 14 Dec	AirAsia X
05 Dec - 14 Dec	AirAsia X
06 Dec - 24 Dec	AirAsia X
06 Dec - 26 Dec	AirAsia X
05 Dec - 24 Dec	AirAsia X
28 Dec - 29 Jan	Qatar Airways
04 Dec - 01 Jan	Virgin Australia
30 Dec - 20 Jan	Qatar Airways
02 Dec - 30 Jan	AirAsia X
05 Dec - 18 Jan	AirAsia X
08 Dec - 02 Jan	Virgin Australia
05 Dec - 19 Jan	AirAsia X
30 Dec - 02 Jan	Virgin Australia
05 Dec - 09 Jan	AirAsia X
15 Dec - 24 Dec	AirAsia X
13 Dec - 24 Dec	AirAsia X
15 Dec - 26 Dec	AirAsia X
25 Dec - 21 Jan	Virgin Australia

Also check the deals for one-way flights from Sydney to Karachi in December.

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 December from $1109

Return flights