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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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1817
Miles
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2925
Kilometers
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1579
Nautical miles

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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.

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 Flag of 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 Flag of United States
IATA Code: HLN
ICAO Code: KHLN
Coordinates: 46°36′24″N, 111°58′58″W