Air Miles Calculator

Distance between San Diego, CA (SAN) and Helena, MT (HLN)

Flight distance from San Diego to Helena (San Diego International Airport – Helena Regional Airport) is 996 miles / 1603 kilometers / 865 nautical miles. Estimated flight time is 2 hours 23 minutes.

Driving distance from San Diego (SAN) to Helena (HLN) is 1233 miles / 1985 kilometers and travel time by car is about 20 hours 18 minutes.

Map of flight path and driving directions from San Diego to Helena.

Shortest flight path between San Diego International Airport (SAN) and Helena Regional Airport (HLN).

How far is Helena from San Diego?

There are several ways to calculate distances between San Diego and Helena. Here are two common 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 earth.

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).

Airport information


A San Diego International Airport
City: San Diego, CA
Country: United States Flag of United States
IATA Code: SAN
ICAO Code: KSAN
Coordinates: 32°44′0″N, 117°11′24″W

B Helena Regional Airport
City: Helena, MT
Country: United States Flag of 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 San Diego and Helena is 1 hour. Helena is 1 hour ahead of San Diego.

Time Difference

San Diego, CA

 PST

Helena, MT

 MST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 151 kg (332 pounds).

Frequent Flyer Miles Calculator

San Diego (SAN) → Helena (HLN).

Distance:
996
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
996

Round trip?