# Distance between Sioux City, IA (SUX) and Helena, MT (HLN)

Flight distance from Sioux City to Helena (Sioux Gateway Airport – Helena Regional Airport) is 822 miles / 1323 kilometers / 714 nautical miles. Estimated flight time is 2 hours 3 minutes.

Driving distance from Sioux City (SUX) to Helena (HLN) is 1044 miles / 1680 kilometers and travel time by car is about 16 hours 40 minutes.

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

Shortest flight path between Sioux Gateway Airport (SUX) and Helena Regional Airport (HLN).

## How far is Helena from Sioux City?

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

Vincenty's formula (applied above)
• 821.902 miles
• 1322.723 kilometers
• 714.213 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
• 819.984 miles
• 1319.637 kilometers
• 712.547 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 Sioux Gateway Airport
City: Sioux City, IA
Country: United States
IATA Code: SUX
ICAO Code: KSUX
Coordinates: 42°24′9″N, 96°23′3″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

The time difference between Sioux City and Helena is 1 hour. Helena is 1 hour behind Sioux City.

CDT

MDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 137 kg (302 pounds).

## Frequent Flyer Miles Calculator

Sioux City (SUX) → Helena (HLN).

Distance:
822
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
822

Round trip?