How far is Helena, MT, from Sioux City, IA?
The distance between Sioux City (Sioux Gateway Airport) and Helena (Helena Regional Airport) is 822 miles / 1323 kilometers / 714 nautical miles.
The driving distance from Sioux City (SUX) to Helena (HLN) is 989 miles / 1591 kilometers, and travel time by car is about 17 hours 21 minutes.
Sioux Gateway Airport – Helena Regional Airport
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Distance from Sioux City to Helena
There are several ways to calculate the distance from Sioux City to Helena. Here are two standard 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 planet.
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).
How long does it take to fly from Sioux City to Helena?
The estimated flight time from Sioux Gateway Airport to Helena Regional Airport is 2 hours and 3 minutes.
What is the time difference between Sioux City and Helena?
The time difference between Sioux City and Helena is 1 hour. Helena is 1 hour behind Sioux City.
Flight carbon footprint between Sioux Gateway Airport (SUX) and Helena Regional Airport (HLN)
On average, flying from Sioux City to Helena generates about 137 kg of CO2 per passenger, and 137 kilograms equals 302 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Sioux City to Helena
See the map of the shortest flight path between Sioux Gateway Airport (SUX) and Helena Regional Airport (HLN).
Airport information
| Origin | 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 |
| Destination | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″W |