How far is Helena, MT, from Green Bay, WI?
The distance between Green Bay (Green Bay–Austin Straubel International Airport) and Helena (Helena Regional Airport) is 1162 miles / 1870 kilometers / 1010 nautical miles.
The driving distance from Green Bay (GRB) to Helena (HLN) is 1334 miles / 2147 kilometers, and travel time by car is about 24 hours 1 minutes.
Green Bay–Austin Straubel International Airport – Helena Regional Airport
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Distance from Green Bay to Helena
There are several ways to calculate the distance from Green Bay to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 1162.211 miles
- 1870.398 kilometers
- 1009.934 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- 1158.992 miles
- 1865.217 kilometers
- 1007.137 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 Green Bay to Helena?
The estimated flight time from Green Bay–Austin Straubel International Airport to Helena Regional Airport is 2 hours and 42 minutes.
What is the time difference between Green Bay and Helena?
The time difference between Green Bay and Helena is 1 hour. Helena is 1 hour behind Green Bay.
Flight carbon footprint between Green Bay–Austin Straubel International Airport (GRB) and Helena Regional Airport (HLN)
On average, flying from Green Bay to Helena generates about 160 kg of CO2 per passenger, and 160 kilograms equals 352 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Green Bay to Helena
See the map of the shortest flight path between Green Bay–Austin Straubel International Airport (GRB) and Helena Regional Airport (HLN).
Airport information
| Origin | Green Bay–Austin Straubel International Airport |
|---|---|
| City: | Green Bay, WI |
| Country: | United States  |
| IATA Code: | GRB |
| ICAO Code: | KGRB |
| Coordinates: | 44°29′6″N, 88°7′46″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 |