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

Return flights

07 Dec - 21 Jan	Wizz Air
06 Dec - 13 Dec	Vueling Airlines
01 Dec - 30 Jan	Vueling Airlines
02 Dec - 17 Dec	Vueling Airlines
06 Dec - 20 Dec	Vueling Airlines
05 Dec - 08 Dec	Wizz Air Malta
08 Dec - 23 Dec	Wizz Air
20 Dec - 10 Jan	Wizz Air Malta
12 Dec - 23 Dec	Pegasus Airlines
23 Dec - 12 Jan	Wizz Air Malta
19 Dec - 10 Jan	Aegean Airlines
21 Dec - 12 Jan	Wizz Air
21 Dec - 13 Jan	Wizz Air
20 Dec - 07 Jan	Wizz Air Malta
19 Dec - 11 Jan	Aegean Airlines
25 Dec - 05 Jan	Wizz Air
21 Dec - 30 Dec	Wizz Air

Also check the deals for one-way flights from Barcelona to Kathmandu in December.

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 Barcelona to Kathmandu in December from $649

Return flights