Air distance from Washington DC, USA to Riga, Latvia is 4426.8 Miles (7124.2 Kilometers / 3844.2 Nautical Miles).
9 hrs, 11 mins is the flight duration between Washington DC and Riga. 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.