# Distance between Casper, WY (CPR) and Great Falls, MT (GTF)

Flight distance from Casper to Great Falls (Casper–Natrona County International Airport – Great Falls International Airport) is 396 miles / 638 kilometers / 344 nautical miles. Estimated flight time is 1 hour 15 minutes.

Driving distance from Casper (CPR) to Great Falls (GTF) is 508 miles / 817 kilometers and travel time by car is about 9 hours 46 minutes.

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

Shortest flight path between Casper–Natrona County International Airport (CPR) and Great Falls International Airport (GTF).

## How far is Great Falls from Casper?

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

Vincenty's formula (applied above)
• 396.275 miles
• 637.742 kilometers
• 344.353 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
• 396.005 miles
• 637.309 kilometers
• 344.119 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 Great Falls International Airport
City: Great Falls, MT
Country: United States
IATA Code: GTF
ICAO Code: KGTF
Coordinates: 47°28′55″N, 111°22′15″W

## Time difference and current local times

There is no time difference between Casper and Great Falls.

MDT

MDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 83 kg (184 pounds).

## Frequent Flyer Miles Calculator

Casper (CPR) → Great Falls (GTF).

Distance:
396
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
396

Round trip?