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

Return flights

19 Sep - 30 Sep	IndiGo
12 Sep - 27 Sep	IndiGo
14 Sep - 04 Oct	Pegasus Airlines
11 Sep - 02 Oct	Pegasus Airlines
01 Sep - 16 Sep	SWISS
16 Sep - 23 Sep	Pegasus Airlines
19 Sep - 21 Sep	AJet
10 Sep - 23 Sep	AJet
09 Sep - 16 Sep	Oman Air
06 Sep - 25 Sep	Air India
20 Sep - 12 Oct	Air India
01 Sep - 20 Sep	Air India
12 Sep - 20 Sep	Air India
20 Sep - 04 Oct	Air India
19 Sep - 07 Oct	Air India
20 Sep - 11 Oct	Air India
06 Sep - 05 Oct	Air India
13 Sep - 09 Oct	Air India
24 Sep - 11 Oct	Air India
30 Sep - 11 Oct	Air India

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 456€

Return flights