Cheapest return flights from Bilbao to Kathmandu in December from $598

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

Return flights

07 Dec - 11 Dec Pegasus Airlines
22 Dec - 08 Jan Pegasus Airlines
21 Dec - 10 Jan Pegasus Airlines
24 Dec - 06 Jan Pegasus Airlines
17 Dec - 04 Jan Pegasus Airlines
18 Dec - 04 Jan Vueling Airlines
24 Dec - 05 Jan Air France

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

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