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

Return flights

22 Sep - 26 Sep	AirAsia X
26 Sep - 01 Oct	AirAsia X
17 Sep - 21 Sep	AirAsia X
22 Sep - 01 Oct	AirAsia X
18 Sep - 25 Sep	SalamAir
18 Sep - 22 Sep	SalamAir
26 Sep - 04 Oct	AirAsia X
30 Sep - 30 Oct	Batik Air Malaysia
24 Sep - 15 Oct	AirAsia X
16 Sep - 18 Sep	SalamAir
10 Sep - 17 Sep	Etihad Airways
16 Sep - 19 Sep	SalamAir
08 Sep - 15 Sep	SalamAir
28 Sep - 15 Oct	AirAsia X
30 Sep - 07 Oct	Batik Air Malaysia
14 Sep - 17 Sep	AirAsia X
17 Sep - 19 Sep	AirAsia X
15 Sep - 15 Oct	Oman Air
30 Sep - 08 Oct	Qatar Airways
26 Sep - 15 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 $479

Return flights