Air distance from Saint-Denis, Reunion (French) to Cayenne, French Guiana is 7456.8 Miles (12000.5 Kilometers / 6475.5 Nautical Miles).
Flight duration time from Saint-Denis to Cayenne is 15 hrs, 29 mins. 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.