How far is Helena, MT, from Portland, OR?
The distance between Portland (Portland International Airport) and Helena (Helena Regional Airport) is 514 miles / 828 kilometers / 447 nautical miles.
The driving distance from Portland (PDX) to Helena (HLN) is 661 miles / 1063 kilometers, and travel time by car is about 12 hours 4 minutes.
Portland International Airport – Helena Regional Airport
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Distance from Portland to Helena
There are several ways to calculate the distance from Portland to Helena. 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 Portland to Helena?
The estimated flight time from Portland International Airport to Helena Regional Airport is 1 hour and 28 minutes.
What is the time difference between Portland and Helena?
The time difference between Portland and Helena is 1 hour. Helena is 1 hour ahead of Portland.
Flight carbon footprint between Portland International Airport (PDX) and Helena Regional Airport (HLN)
On average, flying from Portland to Helena 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 Portland to Helena
See the map of the shortest flight path between Portland International Airport (PDX) and Helena Regional Airport (HLN).
Airport information
| Origin | Portland International Airport |
|---|---|
| City: | Portland, OR |
| Country: | United States  |
| IATA Code: | PDX |
| ICAO Code: | KPDX |
| Coordinates: | 45°35′19″N, 122°35′52″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 |