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

Return flights

18 Jan - 25 Jan	Air India
19 Jan - 25 Jan	Air India
16 Jan - 25 Jan	Air India
19 Jan - 28 Jan	Air India
28 Jan - 16 Feb	Air India
17 Jan - 23 Jan	Air India
18 Jan - 25 Jan	SriLankan Airlines	direct
19 Jan - 25 Jan	SriLankan Airlines	direct
19 Jan - 28 Jan	SriLankan Airlines	direct
11 Jan - 15 Jan	SriLankan Airlines	direct
28 Jan - 16 Feb	SriLankan Airlines	direct

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

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 January from $370

Return flights