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

Return flights

29 Jan - 09 Feb	Air India
28 Jan - 04 Feb	Air Arabia
24 Jan - 04 Feb	Air India
22 Jan - 28 Jan	SriLankan Airlines	direct
22 Jan - 26 Jan	SriLankan Airlines	direct
26 Jan - 01 Feb	SriLankan Airlines	direct
21 Jan - 02 Feb	Air Arabia
28 Jan - 04 Feb	SriLankan Airlines	direct
25 Jan - 01 Feb	Air Arabia
23 Jan - 30 Jan	Air Arabia
30 Jan - 05 Feb	Air India
23 Jan - 29 Jan	Air Arabia
24 Jan - 31 Jan	Air Arabia
21 Jan - 02 Feb	SriLankan Airlines	direct
22 Jan - 29 Jan	SriLankan Airlines	direct
22 Jan - 02 Feb	Air Arabia

Also check the deals for one-way flights from Kathmandu to Colombo 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 Kathmandu to Colombo in January from $429

Return flights