# Distance between Casper, WY (CPR) and Westerly, RI (WST)

Flight distance from Casper to Westerly (Casper–Natrona County International Airport – Westerly State Airport) is 1771 miles / 2851 kilometers / 1539 nautical miles. Estimated flight time is 3 hours 51 minutes.

Driving distance from Casper (CPR) to Westerly (WST) is 2057 miles / 3310 kilometers and travel time by car is about 35 hours 4 minutes.

## Map of flight path and driving directions from Casper to Westerly.

Shortest flight path between Casper–Natrona County International Airport (CPR) and Westerly State Airport (WST).

## How far is Westerly from Casper?

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

Vincenty's formula (applied above)
• 1771.397 miles
• 2850.788 kilometers
• 1539.302 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
• 1766.776 miles
• 2843.350 kilometers
• 1535.286 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
IATA Code: CPR
ICAO Code: KCPR
Coordinates: 42°54′28″N, 106°27′50″W

B Westerly State Airport
City: Westerly, RI
Country: United States
IATA Code: WST
ICAO Code: KWST
Coordinates: 41°20′58″N, 71°48′12″W

## Time difference and current local times

The time difference between Casper and Westerly is 2 hours. Westerly is 2 hours ahead of Casper.

MDT

EDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 198 kg (436 pounds).

## Frequent Flyer Miles Calculator

Casper (CPR) → Westerly (WST).

Distance:
1771
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1771

Round trip?