Cheapest return flights from Colombo to Kathmandu in September from 312€

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

Return flights

08 Sep - 17 Sep Air India
01 Sep - 04 Sep Air India
03 Sep - 11 Sep Air India
15 Sep - 06 Oct Air India
17 Sep - 07 Oct Air India
19 Sep - 30 Sep Air India
18 Sep - 29 Sep Air India
18 Sep - 08 Oct Air India
18 Sep - 25 Sep IndiGo
19 Sep - 26 Sep Air India
28 Sep - 12 Oct IndiGo
08 Sep - 17 Sep SriLankan Airlines direct
01 Sep - 04 Sep SriLankan Airlines direct
03 Sep - 11 Sep SriLankan Airlines direct
27 Sep - 12 Oct SriLankan Airlines
28 Sep - 12 Oct SriLankan Airlines direct

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

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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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