Air Miles Calculator

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

Flight distance from Chicago to Washington D.C. (Chicago O'Hare International Airport – Ronald Reagan Washington National Airport) is 612 miles / 985 kilometers / 532 nautical miles. Estimated flight time is 1 hour 39 minutes.

Driving distance from Chicago (ORD) to Washington D.C. (DCA) is 718 miles / 1155 kilometers and travel time by car is about 12 hours 43 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 Ronald Reagan Washington National Airport (DCA).

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)
  • 611.819 miles
  • 984.627 kilometers
  • 531.656 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
  • 610.572 miles
  • 982.620 kilometers
  • 530.573 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 Ronald Reagan Washington National Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: DCA
ICAO Code: KDCA
Coordinates: 38°51′7″N, 77°2′15″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

 CDT

Washington D.C.

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 114 kg (252 pounds).

Frequent Flyer Miles Calculator

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

Distance:
612
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
612

Round trip?