AirHint found the following cheapest return flights from Oslo (OSL) to Helsinki (HEL) in December 2026 (see full year).
Return flights
| 03 Dec - 10 Dec | Norwegian | direct | |
| 27 Dec - 01 Jan | Norwegian | direct | |
| 03 Dec - 22 Dec | Norwegian | ||
| 27 Dec - 29 Dec | Norwegian | ||
| 27 Dec - 30 Dec | Norwegian |
Also check the deals for one-way flights from Oslo to Helsinki in December.
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