How far is Helena, MT, from Ontario, CA?
The distance between Ontario (Ontario International Airport) and Helena (Helena Regional Airport) is 915 miles / 1472 kilometers / 795 nautical miles.
The driving distance from Ontario (ONT) to Helena (HLN) is 1133 miles / 1823 kilometers, and travel time by car is about 19 hours 0 minutes.
Ontario International Airport – Helena Regional Airport
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Distance from Ontario to Helena
There are several ways to calculate the distance from Ontario to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 914.757 miles
- 1472.158 kilometers
- 794.902 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- 915.651 miles
- 1473.597 kilometers
- 795.679 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 Ontario to Helena?
The estimated flight time from Ontario International Airport to Helena Regional Airport is 2 hours and 13 minutes.
What is the time difference between Ontario and Helena?
The time difference between Ontario and Helena is 1 hour. Helena is 1 hour ahead of Ontario.
Flight carbon footprint between Ontario International Airport (ONT) and Helena Regional Airport (HLN)
On average, flying from Ontario to Helena generates about 145 kg of CO2 per passenger, and 145 kilograms equals 319 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Ontario to Helena
See the map of the shortest flight path between Ontario International Airport (ONT) and Helena Regional Airport (HLN).
Airport information
| Origin | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States  |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′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 |