Air Miles Calculator

Distance between Washington D.C. (DCA) and Ontario, CA (ONT)

Flight distance from Washington D.C. to Ontario (Ronald Reagan Washington National Airport – Ontario International Airport) is 2265 miles / 3645 kilometers / 1968 nautical miles. Estimated flight time is 4 hours 47 minutes.

Driving distance from Washington D.C. (DCA) to Ontario (ONT) is 2599 miles / 4182 kilometers and travel time by car is about 43 hours 47 minutes.

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

Shortest flight path between Ronald Reagan Washington National Airport (DCA) and Ontario International Airport (ONT).

How far is Ontario from Washington D.C.?

There are several ways to calculate distances between Washington D.C. and Ontario. Here are two common methods:

Vincenty's formula (applied above)
  • 2264.800 miles
  • 3644.843 kilometers
  • 1968.058 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
  • 2259.809 miles
  • 3636.810 kilometers
  • 1963.720 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 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

B Ontario International Airport
City: Ontario, CA
Country: United States Flag of United States
IATA Code: ONT
ICAO Code: KONT
Coordinates: 34°3′21″N, 117°36′3″W

Time difference and current local times

The time difference between Washington D.C. and Ontario is 3 hours. Ontario is 3 hours behind Washington D.C..

Time Difference

Washington D.C.

 EDT

Ontario, CA

 PDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 248 kg (546 pounds).

Frequent Flyer Miles Calculator

Washington D.C. (DCA) → Ontario (ONT).

Distance:
2265
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2265

Round trip?