AirHint found the following cheapest one-way flights from Helsinki (HEL) to Oulu (OUL) in March 2026 (see full year).
One-Way flights
| 18 Mar | Finnair | direct | |
| 17 Mar | Finnair | direct | |
| 03 Mar | Finnair | direct | |
| 04 Mar | Finnair | direct | |
| 29 Mar | Finnair | direct |
Also check the deals for return flights from Helsinki to Oulu in March.
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