Air distance from Saint-Denis, Reunion (French) to Castries, Saint Lucia is 8204.8 Miles (13204.3 Kilometers / 7125 Nautical Miles).
Flight duration time from Saint-Denis to Castries is 17 hrs, 2 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.