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

Return flights

05 Sep - 25 Sep	IndiGo
03 Sep - 10 Sep	Turkish Airlines
17 Sep - 10 Oct	Aer Lingus
13 Sep - 07 Oct	IndiGo
24 Sep - 01 Oct	Turkish Airlines
18 Sep - 09 Oct	KLM
18 Sep - 10 Oct	IndiGo
22 Sep - 30 Sep	IndiGo
22 Sep - 27 Oct	Etihad Airways
18 Sep - 05 Oct	Etihad Airways
29 Sep - 15 Oct	IndiGo
30 Sep - 15 Oct	IndiGo
30 Sep - 16 Oct	IndiGo

Also check the deals for one-way flights from Dublin 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 Dublin to Kathmandu in September from 681€

Return flights