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

Return flights

27 Sep - 10 Oct	SalamAir
14 Sep - 08 Oct	SalamAir
15 Sep - 08 Oct	SalamAir
12 Sep - 06 Oct	SalamAir
13 Sep - 06 Oct	SalamAir
30 Sep - 13 Oct	SalamAir
13 Sep - 17 Sep	SalamAir
16 Sep - 19 Sep	SalamAir
13 Sep - 18 Sep	SalamAir
13 Sep - 07 Oct	SalamAir
02 Sep - 17 Sep	SalamAir
11 Sep - 15 Sep	SalamAir
04 Sep - 11 Sep	SalamAir
01 Sep - 16 Sep	SalamAir
13 Sep - 27 Sep	SalamAir
04 Sep - 08 Sep	SalamAir
12 Sep - 20 Sep	SalamAir
30 Sep - 04 Oct	SalamAir
25 Sep - 24 Oct	SalamAir
25 Sep - 09 Oct	Air Arabia

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 348€

Return flights