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

Return flights

20 Dec - 25 Dec	IndiGo	direct
21 Dec - 27 Dec	IndiGo	direct
01 Dec - 06 Dec	IndiGo	direct
04 Dec - 08 Dec	IndiGo	direct
11 Dec - 18 Dec	IndiGo	direct
18 Dec - 31 Dec	IndiGo	direct
19 Dec - 27 Dec	IndiGo	direct
26 Dec - 04 Jan	IndiGo	direct
14 Dec - 10 Jan	IndiGo	direct
30 Dec - 02 Jan	IndiGo	direct
28 Dec - 04 Jan	IndiGo	direct
01 Dec - 02 Jan	IndiGo	direct
10 Dec - 17 Dec	IndiGo	direct
25 Dec - 01 Jan	IndiGo	direct
04 Dec - 07 Dec	IndiGo	direct
18 Dec - 19 Jan	IndiGo	direct
23 Dec - 03 Jan	IndiGo	direct
26 Dec - 01 Jan	IndiGo	direct
09 Dec - 10 Dec	Air India	direct

Also check the deals for one-way flights from Delhi 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 Delhi to Kathmandu in December from $194

Return flights