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

Return flights

08 Sep - 22 Sep	Pegasus Airlines
07 Sep - 21 Sep	Etihad Airways
26 Sep - 19 Oct	Pegasus Airlines
05 Sep - 17 Sep	Wizz Air Malta
01 Sep - 30 Sep	Wizz Air Malta
03 Sep - 23 Sep	Etihad Airways
06 Sep - 27 Sep	Ryanair
05 Sep - 14 Sep	Wizz Air Malta
26 Sep - 15 Oct	Pegasus Airlines
01 Sep - 28 Sep	Wizz Air Malta
07 Sep - 22 Sep	Ryanair
10 Sep - 28 Sep	Wizz Air Malta
26 Sep - 12 Oct	Pegasus Airlines
10 Sep - 12 Oct	Wizz Air Malta
10 Sep - 10 Oct	Wizz Air Malta
30 Sep - 22 Oct	Vueling Airlines
18 Sep - 08 Oct	Wizz Air Malta
29 Sep - 27 Oct	Pegasus Airlines
17 Sep - 07 Oct	Etihad Airways
17 Sep - 09 Oct	Ryanair

Also check the deals for one-way flights from Barcelona 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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Barcelona to Kathmandu in September from $806

Return flights