Cheapest return flights from Oslo to Helsinki in December from $119

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

Return flights

03 Dec - 06 Dec airBaltic
10 Dec - 10 Dec airBaltic
08 Dec - 10 Dec airBaltic
29 Dec - 31 Dec airBaltic
30 Dec - 12 Jan airBaltic
30 Dec - 01 Jan airBaltic
10 Dec - 15 Dec airBaltic
17 Dec - 19 Dec Finnair
17 Dec - 18 Dec Finnair
12 Dec - 17 Dec Finnair
08 Dec - 12 Dec Norwegian direct
08 Dec - 18 Dec Norwegian direct
28 Dec - 08 Jan Ethiopian Airlines
26 Dec - 01 Jan Scandinavian Airlines
29 Dec - 15 Jan Norwegian direct
29 Dec - 08 Jan Norwegian direct
28 Dec - 15 Jan Norwegian Air Sweden AOC
14 Dec - 01 Jan Norwegian direct
30 Dec - 02 Jan airBaltic
28 Dec - 15 Jan Norwegian direct

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

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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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