Air distance from Saint-Denis, Reunion (French) to Havana, Cuba is 9712.9 Miles (15631.3 Kilometers / 8434.6 Nautical Miles).
Flight duration time from Saint-Denis to Havana is 20 hrs, 10 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.