Air Miles Calculator

Distance between Casper, WY (CPR) and Ontario, CA (ONT)

Flight distance from Casper to Ontario (Casper–Natrona County International Airport – Ontario International Airport) is 857 miles / 1380 kilometers / 745 nautical miles. Estimated flight time is 2 hours 7 minutes.

Driving distance from Casper (CPR) to Ontario (ONT) is 1035 miles / 1665 kilometers and travel time by car is about 17 hours 29 minutes.

Map of flight path and driving directions from Casper to Ontario.

Shortest flight path between Casper–Natrona County International Airport (CPR) and Ontario International Airport (ONT).

How far is Ontario from Casper?

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

Vincenty's formula (applied above)
  • 857.233 miles
  • 1379.584 kilometers
  • 744.916 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
  • 856.958 miles
  • 1379.140 kilometers
  • 744.676 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 Casper–Natrona County International Airport
City: Casper, WY
Country: United States Flag of United States
IATA Code: CPR
ICAO Code: KCPR
Coordinates: 42°54′28″N, 106°27′50″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 Casper and Ontario is 1 hour. Ontario is 1 hour behind Casper.

Time Difference

Casper, WY

 MST

Ontario, CA

 PST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 140 kg (309 pounds).

Frequent Flyer Miles Calculator

Casper (CPR) → Ontario (ONT).

Distance:
857
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
857

Round trip?