Air distance from Saint-Denis, Reunion (French) to Helsinki, Finland is 5831.3 Miles (9384.6 Kilometers / 5063.9 Nautical Miles).
12 hrs, 6 mins is the flight duration between Saint-Denis and Helsinki. This is the In-The-Air flight time. You should also add the taxi time, airport wait times and possible delays due to bad weather, etc. for the total flight duration time.