Distance between Casper, WY (CPR) and St Michael, AK (SMK)

Flight distance from Casper to St Michael (Casper–Natrona County International Airport – St. Michael Airport) is 2595 miles / 4176 kilometers / 2255 nautical miles. Estimated flight time is 5 hours 24 minutes.

Driving distance from Casper (CPR) to St Michael (SMK) is 3639 miles / 5856 kilometers and travel time by car is about 137 hours 25 minutes.

Map of flight path and driving directions from Casper to St Michael.

Shortest flight path between Casper–Natrona County International Airport (CPR) and St. Michael Airport (SMK).

How far is St Michael from Casper?

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

Vincenty's formula (applied above)
• 2595.023 miles
• 4176.284 kilometers
• 2255.013 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
• 2588.569 miles
• 4165.898 kilometers
• 2249.405 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 St. Michael Airport
City: St Michael, AK
Country: United States
IATA Code: SMK
ICAO Code: PAMK
Coordinates: 63°29′24″N, 162°6′36″W

Time difference and current local times

The time difference between Casper and St Michael is 2 hours. St Michael is 2 hours behind Casper.

MDT

AKDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 286 kg (631 pounds).

Frequent Flyer Miles Calculator

Casper (CPR) → St Michael (SMK).

Distance:
2595
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2595

Round trip?