Calculations with different methods
- 4505.128 miles
- 7250.301 kilometers
- 3914.850 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.Haversine formula
- 4493.920 miles
- 7232.264 kilometers
- 3905.110 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Leonardo da Vinci–Fiumicino Airport (FCO) to Washington Dulles International Airport (IAD) is 9 hours 1 minutes.
Time difference and current local times
The time difference between Rome and Washington D.C. is 6 hours. Washington D.C. is 6 hours behind Rome.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 554 kg (1 221 pounds).
Rome to Washington D.C. flight map.
Frequent Flyer Miles Calculator
Rome (FCO) → Washington D.C. (IAD).