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

Return flights

22 Sep - 29 Sep	AirAsia X
22 Sep - 30 Sep	AirAsia X
28 Sep - 15 Oct	AirAsia X
17 Sep - 21 Sep	AirAsia X
28 Sep - 26 Oct	AirAsia X
18 Sep - 22 Sep	SalamAir
10 Sep - 14 Sep	Etihad Airways
10 Sep - 15 Sep	Etihad Airways
17 Sep - 22 Sep	AirAsia X
19 Sep - 22 Sep	AirAsia X
07 Sep - 14 Sep	SalamAir
11 Sep - 15 Sep	SalamAir
28 Sep - 19 Oct	AirAsia X
22 Sep - 06 Oct	AirAsia X
22 Sep - 08 Oct	AirAsia X
28 Sep - 08 Oct	AirAsia X
15 Sep - 19 Oct	Etihad Airways
15 Sep - 15 Oct	AirAsia X
17 Sep - 06 Oct	AirAsia X
19 Sep - 06 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 392€

Return flights