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

Return flights

31 Dec - 31 Jan	easyJet
31 Dec - 30 Jan	Pegasus Airlines
22 Dec - 31 Jan	Pegasus Airlines
30 Dec - 13 Jan	Ryanair
30 Dec - 28 Jan	Ryanair
30 Dec - 15 Jan	Ryanair
31 Dec - 19 Jan	Ryanair
22 Dec - 30 Jan	Pegasus Airlines
31 Dec - 27 Jan	easyJet
31 Dec - 29 Jan	easyJet
23 Dec - 30 Dec	Pegasus Airlines
22 Dec - 25 Dec	Pegasus Airlines
24 Dec - 26 Dec	Pegasus Airlines
24 Dec - 31 Dec	Pegasus Airlines

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 613€

Return flights