How far is Helena, MT, from San Diego, CA?
The distance between San Diego (San Diego International Airport) and Helena (Helena Regional Airport) is 996 miles / 1603 kilometers / 865 nautical miles.
The driving distance from San Diego (SAN) to Helena (HLN) is 1233 miles / 1985 kilometers, and travel time by car is about 20 hours 53 minutes.
San Diego International Airport – Helena Regional Airport
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Distance from San Diego to Helena
There are several ways to calculate the distance from San Diego to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 995.974 miles
- 1602.865 kilometers
- 865.478 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- 997.159 miles
- 1604.772 kilometers
- 866.508 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 San Diego to Helena?
The estimated flight time from San Diego International Airport to Helena Regional Airport is 2 hours and 23 minutes.
What is the time difference between San Diego and Helena?
The time difference between San Diego and Helena is 1 hour. Helena is 1 hour ahead of San Diego.
Flight carbon footprint between San Diego International Airport (SAN) and Helena Regional Airport (HLN)
On average, flying from San Diego to Helena generates about 151 kg of CO2 per passenger, and 151 kilograms equals 332 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from San Diego to Helena
See the map of the shortest flight path between San Diego International Airport (SAN) and Helena Regional Airport (HLN).
Airport information
| Origin | San Diego International Airport |
|---|---|
| City: | San Diego, CA |
| Country: | United States  |
| IATA Code: | SAN |
| ICAO Code: | KSAN |
| Coordinates: | 32°44′0″N, 117°11′24″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 |