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

Return flights

08 Dec - 21 Dec	Ryanair
09 Dec - 21 Dec	Norwegian Air Sweden AOC
10 Dec - 17 Dec	Finnair
08 Dec - 22 Dec	Ryanair
31 Dec - 22 Jan	Ryanair
11 Dec - 14 Jan	Ryanair
13 Dec - 21 Dec	Ryanair
09 Dec - 22 Dec	Finnair
11 Dec - 12 Jan	Ryanair
29 Dec - 20 Jan	Finnair
31 Dec - 31 Jan	Ryanair
12 Dec - 10 Jan	Pegasus Airlines
18 Dec - 31 Dec	Pegasus Airlines
10 Dec - 13 Jan	Finnair
21 Dec - 27 Jan	Ryanair
18 Dec - 30 Dec	Pegasus Airlines
14 Dec - 17 Jan	Ryanair
16 Dec - 14 Jan	Finnair
19 Dec - 31 Dec	Pegasus Airlines
24 Dec - 31 Dec	Pegasus Airlines

Also check the deals for one-way flights from Helsinki 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 Helsinki to Kathmandu in December from $718

Return flights