Cheapest return flights from Colombo to Kathmandu in September from $486

AirHint found the following cheapest return flights from Colombo (CMB) to Kathmandu (KTM) in September 2026 (see full year).

Return flights

03 Sep - 09 Sep SriLankan Airlines direct
02 Sep - 07 Sep SriLankan Airlines direct
09 Sep - 14 Sep SriLankan Airlines direct
06 Sep - 11 Sep Air India
06 Sep - 12 Sep Air India
07 Sep - 13 Sep Air India
04 Sep - 10 Sep Air India
07 Sep - 13 Sep SriLankan Airlines direct
05 Sep - 10 Sep Air India
05 Sep - 11 Sep IndiGo

Also check the deals for one-way flights from Colombo to Kathmandu in September.

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