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

Return flights

12 Mar - 15 Mar	SriLankan Airlines	direct
22 Mar - 27 Mar	Air India
11 Mar - 22 Mar	Air India
08 Mar - 11 Mar	Air India
25 Mar - 30 Mar	SriLankan Airlines	direct
16 Mar - 05 Apr	Air India
08 Mar - 11 Mar	SriLankan Airlines	direct
11 Mar - 14 Mar	Air India
14 Mar - 03 Apr	Air India
13 Mar - 26 Mar	Air India
16 Mar - 29 Mar	Air India
12 Mar - 25 Mar	Air India
16 Mar - 05 Apr	SriLankan Airlines	direct

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

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 Colombo to Kathmandu in March from 339€

Return flights