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

Return flights

17 Oct - 04 Nov	Air India
16 Oct - 03 Nov	Air India
13 Oct - 23 Oct	Air India
27 Oct - 03 Nov	Air India
16 Oct - 29 Oct	Air India
13 Oct - 23 Oct	SriLankan Airlines	direct
17 Oct - 30 Oct	Air India
20 Oct - 27 Oct	Air India
05 Oct - 08 Oct	SriLankan Airlines	direct

Also check the deals for one-way flights from Colombo to Kathmandu 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 Colombo to Kathmandu in October from 335€

Return flights