Air Miles Calculator

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

Distance from Washington Dulles International Airport to O'Hare 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 Washington Dulles International Airport (IAD) to O'Hare International Airport (ORD) is 1 hour 36 minutes.

Time difference and current local times

The time difference between Washington D.C. and Chicago is 1 hour. Chicago is 1 hour behind Washington D.C..

Time Difference

Washington D.C.
Chicago

Washington D.C.

 EST

Chicago, IL

 CST

Airport information


A 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

B 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

Map

Flight map from Washington D.C. to Chicago.

Frequent Flyer Miles Calculator

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

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?