How far is Portland, OR, from Helena, MT?
The distance between Helena (Helena Regional Airport) and Portland (Portland International Airport) is 514 miles / 828 kilometers / 447 nautical miles.
The driving distance from Helena (HLN) to Portland (PDX) is 661 miles / 1063 kilometers, and travel time by car is about 12 hours 6 minutes.
Helena Regional Airport – Portland International Airport
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Distance from Helena to Portland
There are several ways to calculate the distance from Helena to Portland. Here are two standard methods:
Vincenty's formula (applied above)- 514.457 miles
- 827.938 kilometers
- 447.051 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- 513.019 miles
- 825.624 kilometers
- 445.801 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 Helena to Portland?
The estimated flight time from Helena Regional Airport to Portland International Airport is 1 hour and 28 minutes.
What is the time difference between Helena and Portland?
The time difference between Helena and Portland is 1 hour. Portland is 1 hour behind Helena.
Flight carbon footprint between Helena Regional Airport (HLN) and Portland International Airport (PDX)
On average, flying from Helena to Portland generates about 101 kg of CO2 per passenger, and 101 kilograms equals 222 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Helena to Portland
See the map of the shortest flight path between Helena Regional Airport (HLN) and Portland International Airport (PDX).
Airport information
| Origin | Helena Regional Airport |
|---|---|
| City: | Helena, MT |
| Country: | United States  |
| IATA Code: | HLN |
| ICAO Code: | KHLN |
| Coordinates: | 46°36′24″N, 111°58′58″W |
| Destination | Portland International Airport |
|---|---|
| City: | Portland, OR |
| Country: | United States |
| IATA Code: | PDX |
| ICAO Code: | KPDX |
| Coordinates: | 45°35′19″N, 122°35′52″W |