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

Return flights

08 Sep - 27 Sep	IndiGo
05 Sep - 27 Sep	IndiGo
15 Sep - 27 Sep	IndiGo
19 Sep - 30 Sep	IndiGo
10 Sep - 27 Sep	IndiGo
12 Sep - 30 Sep	Pegasus Airlines
11 Sep - 02 Oct	Pegasus Airlines
01 Sep - 19 Sep	IndiGo
12 Sep - 10 Oct	Pegasus Airlines
10 Sep - 11 Oct	Pegasus Airlines
12 Sep - 09 Oct	Pegasus Airlines
01 Sep - 13 Sep	IndiGo
08 Sep - 30 Sep	IndiGo
05 Sep - 13 Sep	Pegasus Airlines
19 Sep - 07 Oct	IndiGo
19 Sep - 14 Oct	IndiGo
17 Sep - 01 Oct	IndiGo
09 Sep - 07 Oct	Pegasus Airlines
06 Sep - 01 Oct	Pegasus Airlines
12 Sep - 16 Oct	IndiGo

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 $554

Return flights