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).
|A||Chicago O'Hare International Airport|
|B||Washington Dulles International Airport|
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.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 111 kg (245 pounds).
Frequent Flyer Miles Calculator
Chicago (ORD) → Washington D.C. (IAD).