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Chicago to Washington D.C. | ORD - DCA
Calculations with different methods
- 611.819 miles
- 984.627 kilometers
- 531.656 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
- 610.572 miles
- 982.620 kilometers
- 530.573 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from O'Hare International Airport (ORD) to Ronald Reagan Washington National Airport (DCA) is 1 hour 39 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.
Flight map from Chicago to Washington D.C..
Frequent Flyer Miles Calculator
Chicago (ORD) → Washington D.C. (DCA).