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

Return flights

28 Dec - 18 Jan	airBaltic
09 Dec - 11 Dec	airBaltic
09 Dec - 09 Dec	airBaltic
09 Dec - 10 Dec	airBaltic
11 Dec - 14 Dec	airBaltic
02 Dec - 03 Dec	airBaltic
08 Dec - 10 Dec	airBaltic
02 Dec - 09 Dec	airBaltic
22 Dec - 31 Dec	airBaltic
22 Dec - 26 Dec	airBaltic
26 Dec - 02 Jan	airBaltic
31 Dec - 04 Jan	airBaltic
30 Dec - 04 Jan	airBaltic
29 Dec - 01 Jan	airBaltic
28 Dec - 01 Jan	airBaltic
31 Dec - 02 Jan	airBaltic
18 Dec - 01 Jan	airBaltic
08 Dec - 14 Dec	airBaltic
30 Dec - 08 Jan	Finnair
30 Dec - 01 Jan	Finnair

Also check the deals for one-way flights from Helsinki to Oslo 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 Oslo in December from 93€

Return flights