How far is Helena, MT, from Washington D.C.?
The distance between Washington D.C. (Washington Dulles International Airport) and Helena (Helena Regional Airport) is 1817 miles / 2925 kilometers / 1579 nautical miles.
The driving distance from Washington D.C. (IAD) to Helena (HLN) is 2159 miles / 3474 kilometers, and travel time by car is about 39 hours 12 minutes.
Washington Dulles International Airport – Helena Regional Airport
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Distance from Washington D.C. to Helena
There are several ways to calculate the distance from Washington D.C. to Helena. Here are two standard methods:
Vincenty's formula (applied above)- 1817.237 miles
- 2924.560 kilometers
- 1579.136 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- 1812.968 miles
- 2917.689 kilometers
- 1575.426 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 Washington D.C. to Helena?
The estimated flight time from Washington Dulles International Airport to Helena Regional Airport is 3 hours and 56 minutes.
What is the time difference between Washington D.C. and Helena?
Flight carbon footprint between Washington Dulles International Airport (IAD) and Helena Regional Airport (HLN)
On average, flying from Washington D.C. to Helena generates about 201 kg of CO2 per passenger, and 201 kilograms equals 444 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Washington D.C. to Helena
See the map of the shortest flight path between Washington Dulles International Airport (IAD) and Helena Regional Airport (HLN).
Airport information
| Origin | Washington Dulles International Airport |
|---|---|
| City: | Washington D.C. |
| Country: | United States  |
| IATA Code: | IAD |
| ICAO Code: | KIAD |
| Coordinates: | 38°56′40″N, 77°27′20″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 |