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

Return flights

05 Dec - 14 Dec	Air India
01 Dec - 06 Dec	Air India
14 Dec - 17 Dec	SriLankan Airlines
20 Dec - 28 Dec	SriLankan Airlines
27 Dec - 04 Jan	SriLankan Airlines
31 Dec - 04 Jan	SriLankan Airlines
16 Dec - 04 Jan	SriLankan Airlines
24 Dec - 04 Jan	SriLankan Airlines
08 Dec - 14 Dec	SriLankan Airlines
04 Dec - 11 Dec	Air India
02 Dec - 09 Dec	Air India
13 Dec - 18 Dec	Air India
23 Dec - 03 Jan	Air India
13 Dec - 19 Dec	Air India
03 Dec - 09 Dec	Air India
16 Dec - 04 Jan	IndiGo	direct
26 Dec - 02 Jan	Air India
24 Dec - 02 Jan	Air India
31 Dec - 04 Jan	IndiGo	direct
24 Dec - 04 Jan	IndiGo	direct

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 $213

Return flights