# Distance between Casper, WY (CPR) and Alpena, MI (APN)

Flight distance from Casper to Alpena (Casper–Natrona County International Airport – Alpena County Regional Airport) is 1147 miles / 1847 kilometers / 997 nautical miles. Estimated flight time is 2 hours 40 minutes.

Driving distance from Casper (CPR) to Alpena (APN) is 1438 miles / 2315 kilometers and travel time by car is about 25 hours 47 minutes.

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

Shortest flight path between Casper–Natrona County International Airport (CPR) and Alpena County Regional Airport (APN).

## How far is Alpena from Casper?

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

Vincenty's formula (applied above)
• 1147.473 miles
• 1846.679 kilometers
• 997.127 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
• 1144.407 miles
• 1841.744 kilometers
• 994.462 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 Alpena County Regional Airport
City: Alpena, MI
Country: United States
IATA Code: APN
ICAO Code: KAPN
Coordinates: 45°4′41″N, 83°33′37″W

## Time difference and current local times

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

MST

EST

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 159 kg (351 pounds).

## Frequent Flyer Miles Calculator

Casper (CPR) → Alpena (APN).

Distance:
1147
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1147

Round trip?