Air Miles Calculator

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

Flight distance from Chicago to Washington D.C. (Chicago O'Hare International Airport – Washington Dulles International Airport) is 589 miles / 947 kilometers / 512 nautical miles. Estimated flight time is 1 hour 36 minutes.

Driving distance from Chicago (ORD) to Washington D.C. (IAD) is 709 miles / 1141 kilometers and travel time by car is about 12 hours 36 minutes.

Map of flight path and driving directions from Chicago to Washington D.C..

Shortest flight path between Chicago O'Hare International Airport (ORD) and Washington Dulles International Airport (IAD).

How far is Washington D.C. from Chicago?

There are several ways to calculate distances between Chicago and Washington D.C.. Here are two common 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 – the shortest distance between two points).

Airport information


A Chicago 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

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, IL

 CST

Washington D.C.

 EST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 111 kg (245 pounds).

Frequent Flyer Miles Calculator

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

Distance:
589
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
589

Round trip?