How far is Helena from Seattle?
There are several ways to calculate distances between Seattle and Helena. Here are two common methods:Vincenty's formula (applied above)
- 490.827 miles
- 789.909 kilometers
- 426.517 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
- 489.424 miles
- 787.651 kilometers
- 425.298 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).
Estimated flight time from Boeing Field (BFI) to Helena Regional Airport (HLN) is 1 hour 25 minutes.
Time difference and current local times
The time difference between Seattle and Helena is 1 hour. Helena is 1 hour ahead of Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 98 kg (215 pounds).
Seattle to Helena flight path
Shortest flight path between Boeing Field (BFI) and Helena Regional Airport (HLN).
Frequent Flyer Miles Calculator
Seattle (BFI) → Helena (HLN).