Air Miles Calculator

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

Distance from O'Hare International Airport to Washington Dulles International Airport is 589 miles / 947 kilometers / 512 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 588.645 miles
  • 947.332 kilometers
  • 511.518 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
  • 587.448 miles
  • 945.406 kilometers
  • 510.478 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 Washington Dulles International Airport (IAD) is 1 hour 36 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 Washington Dulles International Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: IAD
ICAO Code: KIAD
Coordinates: 38°56′40″N, 77°27′20″W

Map

Flight map from Chicago to Washington D.C..

Frequent Flyer Miles Calculator

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

Elite level bonus (%):
Booking class bonus (%):
Air miles:
589
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
589

Round trip?