Calculations with different methods
- 577.259 miles
- 929.008 kilometers
- 501.624 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
- 576.064 miles
- 927.085 kilometers
- 500.586 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Midway International Airport (MDW) to Washington Dulles International Airport (IAD) is 1 hour 35 minutes.
Time difference and current local times
The time difference between Chicago and Washington D.C. is 1 hour. Washington D.C. is 1 hour ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 100 kg (220 pounds).
Chicago to Washington D.C. flight map.
Frequent Flyer Miles Calculator
Chicago (MDW) → Washington D.C. (IAD).