AirHint found the following cheapest return flights from Mumbai (BOM) to Kathmandu (KTM) in December 2025 (see full year).

Return flights

03 Dec - 11 Dec	Air India
08 Dec - 14 Dec	Air India
12 Dec - 15 Dec	Air India
07 Dec - 14 Dec	Air India
06 Dec - 14 Dec	Air India
05 Dec - 14 Dec	Air India
14 Dec - 17 Dec	SriLankan Airlines
01 Dec - 07 Dec	Air India
13 Dec - 20 Dec	Air India
25 Dec - 02 Jan	Air India
11 Dec - 06 Jan	IndiGo	direct
27 Dec - 01 Jan	SriLankan Airlines
26 Dec - 31 Dec	Air India
28 Dec - 02 Jan	IndiGo	direct
25 Dec - 02 Jan	IndiGo	direct
15 Dec - 04 Jan	Air India Express
15 Dec - 01 Jan	Air India Express
15 Dec - 02 Jan	Air India Express
14 Dec - 04 Jan	Air India Express
14 Dec - 01 Jan	Air India Express

Also check the deals for one-way flights from Mumbai to Kathmandu in December.

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 Mumbai to Kathmandu in December from 154€

Return flights