AirHint found the following cheapest one-way flights from Kathmandu (KTM) to Barcelona (BCN) in August 2025 (see full year).

One-Way flights

04 Aug	Nepal Airlines
05 Aug	Nepal Airlines
30 Aug	Nepal Airlines
24 Aug	Nepal Airlines
22 Aug	Jazeera Airways
12 Aug	Emirates
26 Aug	Etihad Airways
27 Aug	Singapore Airlines
28 Aug	Singapore Airlines

Also check the deals for return flights from Kathmandu to Barcelona in August.

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 one-way flights from Kathmandu to Barcelona in August from $408

One-Way flights