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

Return flights

17 Sep - 06 Oct	Vueling Airlines
17 Sep - 10 Oct	Wizz Air Malta
30 Sep - 13 Oct	Vueling Airlines
10 Sep - 26 Sep	Wizz Air Malta
10 Sep - 30 Sep	Wizz Air Malta
10 Sep - 01 Oct	Wizz Air Malta
12 Sep - 01 Oct	Vueling Airlines
03 Sep - 18 Sep	Pegasus Airlines
01 Sep - 30 Sep	Pegasus Airlines
17 Sep - 09 Oct	Vueling Airlines
12 Sep - 26 Sep	Vueling Airlines
29 Sep - 06 Oct	Vueling Airlines
14 Sep - 24 Sep	Ryanair
19 Sep - 28 Sep	Vueling Airlines
17 Sep - 11 Oct	Ryanair
06 Sep - 22 Sep	Vueling Airlines
14 Sep - 26 Sep	Ryanair
14 Sep - 23 Sep	Ryanair
14 Sep - 05 Oct	Vueling Airlines
20 Sep - 20 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 551€

Return flights