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

Return flights

03 Sep - 30 Sep	SalamAir
13 Sep - 11 Oct	Oman Air
10 Sep - 18 Sep	Qatar Airways
10 Sep - 17 Sep	Qatar Airways
30 Sep - 13 Oct	Qatar Airways
15 Sep - 08 Oct	Qatar Airways
16 Sep - 09 Oct	Qatar Airways
08 Sep - 13 Sep	SalamAir
15 Sep - 23 Sep	Qatar Airways
09 Sep - 15 Sep	Qatar Airways
09 Sep - 16 Sep	Qatar Airways
04 Sep - 10 Sep	SalamAir
10 Sep - 20 Sep	Qatar Airways
29 Sep - 04 Oct	Qatar Airways
27 Sep - 27 Oct	Qatar Airways
20 Sep - 11 Oct	Etihad Airways
12 Sep - 10 Oct	Etihad Airways
19 Sep - 10 Oct	Etihad Airways
18 Sep - 26 Sep	Qatar Airways
27 Sep - 10 Oct	Qatar Airways

Also check the deals for one-way flights from Karachi to Colombo 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 Colombo in September from 411€

Return flights