# 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
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
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.

CDT

EDT

## 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?