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

Return flights

09 Dec - 20 Dec	Air India
08 Dec - 14 Dec	Air India
28 Dec - 02 Jan	Air India
28 Dec - 03 Jan	Air India
07 Dec - 06 Jan	Air India
01 Dec - 25 Dec	Air India
31 Dec - 05 Jan	SriLankan Airlines
30 Dec - 12 Jan	SriLankan Airlines
31 Dec - 12 Jan	SriLankan Airlines
07 Dec - 16 Jan	IndiGo	direct
01 Dec - 01 Jan	SriLankan Airlines
01 Dec - 03 Jan	Air India
29 Dec - 03 Jan	Air India
10 Dec - 16 Dec	Air India
13 Dec - 16 Dec	Air India
10 Dec - 17 Dec	Nepal Airlines	direct
07 Dec - 16 Dec	Air India
05 Dec - 31 Dec	Air India
09 Dec - 20 Dec	IndiGo	direct
08 Dec - 14 Dec	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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Mumbai to Kathmandu in December from 163€

Return flights