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

Return flights

10 Sep - 22 Sep	AirAsia
14 Sep - 22 Sep	AirAsia
10 Sep - 26 Sep	AirAsia
14 Sep - 01 Oct	AirAsia
14 Sep - 26 Sep	AirAsia
07 Sep - 22 Sep	AirAsia
07 Sep - 08 Sep	AirAsia
07 Sep - 26 Sep	AirAsia
05 Sep - 22 Sep	AirAsia
10 Sep - 24 Sep	AirAsia
05 Sep - 08 Sep	AirAsia
29 Sep - 01 Oct	AirAsia
29 Sep - 08 Oct	AirAsia

Also check the deals for one-way flights from Singapore 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 Singapore to Karachi in September from 427€

Return flights