# Distance between Casper, WY (CPR) and Helena, MT (HLN)

Flight distance from Casper to Helena (Casper–Natrona County International Airport – Helena Regional Airport) is 373 miles / 600 kilometers / 324 nautical miles. Estimated flight time is 1 hour 12 minutes.

Driving distance from Casper (CPR) to Helena (HLN) is 522 miles / 840 kilometers and travel time by car is about 8 hours 52 minutes.

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

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

## How far is Helena from Casper?

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

Vincenty's formula (applied above)
• 372.602 miles
• 599.645 kilometers
• 323.783 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
• 372.162 miles
• 598.936 kilometers
• 323.400 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 Helena Regional Airport
City: Helena, MT
Country: United States
IATA Code: HLN
ICAO Code: KHLN
Coordinates: 46°36′24″N, 111°58′58″W

## Time difference and current local times

There is no time difference between Casper and Helena.

MDT

MDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 80 kg (176 pounds).

## Frequent Flyer Miles Calculator

Casper (CPR) → Helena (HLN).

Distance:
373
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
373

Round trip?