Air distance from Saint-Denis, Reunion (French) to Tehran, Iran is 3873.2 Miles (6233.3 Kilometers / 3363.5 Nautical Miles).
8 hrs, 2 mins is the flight duration between Saint-Denis and Tehran. 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.