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

Return flights

19 Sep - 26 Sep	IndiGo
22 Sep - 30 Sep	IndiGo
20 Sep - 30 Sep	IndiGo
17 Sep - 27 Sep	IndiGo
22 Sep - 06 Oct	IndiGo
19 Sep - 07 Oct	IndiGo
19 Sep - 30 Sep	IndiGo
22 Sep - 26 Sep	IndiGo
23 Sep - 15 Oct	IndiGo
23 Sep - 13 Oct	IndiGo
17 Sep - 08 Oct	IndiGo
22 Sep - 20 Oct	IndiGo
17 Sep - 19 Oct	IndiGo
23 Sep - 09 Oct	IndiGo
20 Sep - 27 Sep	IndiGo
19 Sep - 06 Oct	IndiGo
24 Sep - 28 Sep	IndiGo
20 Sep - 01 Oct	IndiGo
21 Sep - 28 Sep	Pegasus Airlines

Also check the deals for one-way flights from Amsterdam to Kathmandu 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 return flights from Amsterdam to Kathmandu in September from 555€

Return flights