AirHint found the following cheapest one-way flights from Kathmandu (KTM) to Delhi (DEL) in September 2025 (see full year).

One-Way flights

22 Sep	Nepal Airlines	direct
25 Sep	Nepal Airlines	direct
21 Sep	Nepal Airlines	direct
19 Sep	Nepal Airlines	direct
02 Sep	Nepal Airlines	direct
18 Sep	Nepal Airlines	direct
08 Sep	Nepal Airlines	direct
26 Sep	Nepal Airlines	direct
10 Sep	Nepal Airlines	direct
20 Sep	Nepal Airlines	direct

Also check the deals for return flights from Kathmandu to Delhi in September.

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 one-way flights from Kathmandu to Delhi in September from $88

One-Way flights