Air distance from Washington DC, USA to Niamey, Niger is 5063 Miles (8148.2 Kilometers / 4396.7 Nautical Miles).
10 hrs, 30 mins is the flight duration between Washington DC and Niamey. 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.