How far is Washington D.C. from Helena, MT?
The distance between Helena (Helena Regional Airport) and Washington D.C. (Washington Dulles International Airport) is 1817 miles / 2925 kilometers / 1579 nautical miles.
The driving distance from Helena (HLN) to Washington D.C. (IAD) is 2156 miles / 3469 kilometers, and travel time by car is about 39 hours 5 minutes.
Helena Regional Airport – Washington Dulles International Airport
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Distance from Helena to Washington D.C.
There are several ways to calculate the distance from Helena to Washington D.C.. 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 Helena to Washington D.C.?
The estimated flight time from Helena Regional Airport to Washington Dulles International Airport is 3 hours and 56 minutes.
What is the time difference between Helena and Washington D.C.?
Flight carbon footprint between Helena Regional Airport (HLN) and Washington Dulles International Airport (IAD)
On average, flying from Helena to Washington D.C. 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 Helena to Washington D.C.
See the map of the shortest flight path between Helena Regional Airport (HLN) and Washington Dulles International Airport (IAD).
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 | 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 |