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

Return flights

15 Sep - 07 Oct	Pegasus Airlines
14 Sep - 07 Oct	Pegasus Airlines
14 Sep - 08 Oct	Pegasus Airlines
15 Sep - 04 Oct	Pegasus Airlines
14 Sep - 05 Oct	Pegasus Airlines
16 Sep - 07 Oct	Pegasus Airlines
17 Sep - 07 Oct	Ryanair
23 Sep - 11 Oct	Aer Lingus
23 Sep - 12 Oct	Aer Lingus
20 Sep - 12 Oct	Ryanair
19 Sep - 22 Sep	Pegasus Airlines
21 Sep - 29 Sep	Pegasus Airlines
20 Sep - 28 Sep	Ryanair
22 Sep - 29 Sep	Pegasus Airlines
22 Sep - 28 Sep	Etihad Airways
21 Sep - 23 Sep	Etihad Airways

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 558€

Return flights