Cheapest return flights from Delhi to Kathmandu in September from $149

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

Return flights

09 Sep - 18 Sep Air India direct
16 Sep - 23 Sep Air India direct
13 Sep - 14 Sep Nepal Airlines direct
13 Sep - 15 Sep Nepal Airlines direct
13 Sep - 20 Sep Nepal Airlines direct
14 Sep - 21 Sep Nepal Airlines direct
10 Sep - 16 Sep Air India direct
10 Sep - 14 Sep Air India direct
16 Sep - 19 Sep Nepal Airlines direct
12 Sep - 14 Sep Air India direct
15 Sep - 15 Oct Nepal Airlines direct
12 Sep - 22 Oct Air India direct
13 Sep - 22 Oct Nepal Airlines direct
16 Sep - 14 Oct Nepal Airlines direct
20 Sep - 04 Oct Nepal Airlines direct
16 Sep - 01 Oct Air India direct
09 Sep - 01 Oct Air India direct
21 Sep - 05 Oct Nepal Airlines direct
19 Sep - 05 Oct Nepal Airlines direct
15 Sep - 12 Oct Air India direct

Also check the deals for one-way flights from Delhi to Kathmandu in September.

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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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