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

Return flights

06 Dec - 12 Jan	Ryanair
01 Dec - 10 Jan	Ryanair
01 Dec - 14 Jan	Ryanair
01 Dec - 11 Dec	Ryanair
03 Dec - 12 Jan	easyJet
01 Dec - 10 Dec	Ryanair
06 Dec - 11 Jan	Ryanair
03 Dec - 24 Jan	easyJet
01 Dec - 22 Dec	Ryanair
06 Dec - 20 Dec	Ryanair
03 Dec - 26 Jan	Ryanair
02 Dec - 17 Jan	easyJet
01 Dec - 15 Jan	Ryanair
01 Dec - 11 Jan	Ryanair
02 Dec - 20 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
09 Dec - 20 Dec	Air Europa
01 Dec - 31 Dec	Ryanair
12 Dec - 19 Dec	Qatar Airways

Also check the deals for one-way flights from Lisbon 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 Lisbon to Kathmandu in December from $614

Return flights