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

Return flights

05 Dec - 31 Jan	IndiGo
23 Dec - 05 Jan	airBaltic
05 Dec - 12 Jan	IndiGo
08 Dec - 27 Dec	IndiGo
09 Dec - 06 Jan	IndiGo
05 Dec - 31 Dec	IndiGo
05 Dec - 08 Jan	IndiGo
18 Dec - 16 Jan	IndiGo
18 Dec - 18 Jan	IndiGo
04 Dec - 13 Jan	IndiGo
18 Dec - 15 Jan	IndiGo
15 Dec - 09 Jan	IndiGo
14 Dec - 21 Dec	Turkish 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 $955

Return flights