Air Miles Calculator

Distance between Chicago, IL (ORD) and Washington D.C. (DCA)

Distance from O'Hare International Airport to Ronald Reagan Washington National Airport is 612 miles / 985 kilometers / 532 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 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).

Flight duration

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.

Time Difference

Chicago
Washington D.C.

Chicago, IL

 CST

Washington D.C.

 EST

Airport information


A O'Hare International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: ORD
ICAO Code: KORD
Coordinates: 41°58′42″N, 87°54′17″W

B Ronald Reagan Washington National Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: DCA
ICAO Code: KDCA
Coordinates: 38°51′7″N, 77°2′15″W

Map

Flight map from Chicago to Washington D.C..

Frequent Flyer Miles Calculator

Chicago (ORD) → Washington D.C. (DCA).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
612
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
612

Round trip?