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

Return flights

24 Oct - 06 Nov	Air India
13 Oct - 20 Oct	Air India
06 Oct - 09 Oct	Air India
08 Oct - 14 Oct	Air India
17 Oct - 17 Oct	Air India
06 Oct - 13 Oct	Air India
09 Oct - 15 Oct	Air India
17 Oct - 24 Oct	Air India
23 Oct - 30 Oct	Air India
04 Oct - 07 Oct	Air India
03 Oct - 07 Oct	Air India

Also check the deals for one-way flights from Kolkata 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 Kolkata to Kathmandu in October from 265€

Return flights