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

Return flights

14 Sep - 22 Sep	AirAsia X
17 Sep - 24 Sep	AirAsia X
25 Sep - 30 Sep	Batik Air Malaysia
01 Sep - 19 Sep	AirAsia X
17 Sep - 19 Sep	AirAsia X
01 Sep - 22 Sep	AirAsia X
17 Sep - 22 Sep	AirAsia X
14 Sep - 19 Sep	AirAsia X
14 Sep - 24 Sep	AirAsia X
01 Sep - 05 Sep	AirAsia X
28 Sep - 10 Oct	AirAsia X
28 Sep - 01 Oct	AirAsia X
17 Sep - 01 Oct	AirAsia X
14 Sep - 01 Oct	AirAsia X

Also check the deals for one-way flights from Karachi to Singapore 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 Karachi to Singapore in September from 408€

Return flights