How far is Washington D.C. from Helena, MT?
The distance between Helena (Helena Regional Airport) and Washington D.C. (Ronald Reagan Washington National Airport) is 1840 miles / 2961 kilometers / 1599 nautical miles.
The driving distance from Helena (HLN) to Washington D.C. (DCA) is 2163 miles / 3481 kilometers, and travel time by car is about 39 hours 16 minutes.
Helena Regional Airport – Ronald Reagan Washington National Airport
Search flights
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)- 1840.105 miles
- 2961.363 kilometers
- 1599.008 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- 1835.788 miles
- 2954.414 kilometers
- 1595.256 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 Ronald Reagan Washington National Airport is 3 hours and 59 minutes.
What is the time difference between Helena and Washington D.C.?
Flight carbon footprint between Helena Regional Airport (HLN) and Ronald Reagan Washington National Airport (DCA)
On average, flying from Helena to Washington D.C. generates about 203 kg of CO2 per passenger, and 203 kilograms equals 448 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 Ronald Reagan Washington National Airport (DCA).
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 | Ronald Reagan Washington National Airport |
|---|---|
| City: | Washington D.C. |
| Country: | United States |
| IATA Code: | DCA |
| ICAO Code: | KDCA |
| Coordinates: | 38°51′7″N, 77°2′15″W |