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

Return flights

02 Dec - 09 Dec	Iberia
05 Dec - 21 Dec	Turkish Airlines
07 Dec - 14 Dec	Turkish Airlines
12 Dec - 24 Jan	Turkish Airlines
07 Dec - 07 Jan	Turkish Airlines
12 Dec - 08 Jan	Turkish Airlines
15 Dec - 31 Dec	Turkish Airlines
01 Dec - 24 Dec	Turkish Airlines
01 Dec - 25 Dec	Turkish Airlines
01 Dec - 27 Dec	Turkish Airlines
01 Dec - 31 Jan	Turkish Airlines
20 Dec - 31 Dec	Turkish Airlines
23 Dec - 27 Jan	Turkish Airlines
23 Dec - 26 Jan	Turkish Airlines
04 Dec - 11 Dec	Emirates
03 Dec - 30 Jan	Emirates
04 Dec - 27 Jan	Emirates
28 Dec - 22 Jan	Turkish Airlines
05 Dec - 12 Dec	Emirates
24 Dec - 16 Jan	Emirates

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 $719

Return flights