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

Return flights

09 Oct - 16 Oct	Air India
10 Oct - 17 Oct	Air India
23 Oct - 27 Oct	SriLankan Airlines	direct
01 Oct - 08 Oct	SriLankan Airlines	direct
09 Oct - 16 Oct	SriLankan Airlines	direct
29 Oct - 05 Nov	Air India
26 Oct - 01 Nov	Air India
25 Oct - 01 Nov	Air India
26 Oct - 02 Nov	Air India
26 Oct - 02 Nov	SriLankan Airlines	direct
27 Oct - 02 Nov	Air India
29 Oct - 05 Nov	SriLankan Airlines	direct
27 Oct - 02 Nov	SriLankan Airlines	direct

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

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 October from 356€

Return flights