# 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
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
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..

EDT

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?