Air Miles Calculator

Distance between Washington D.C. (IAD) and Fort Smith, AR (FSM)

Flight distance from Washington D.C. to Fort Smith (Washington Dulles International Airport – Fort Smith Regional Airport) is 965 miles / 1552 kilometers / 838 nautical miles. Estimated flight time is 2 hours 19 minutes.

Driving distance from Washington D.C. (IAD) to Fort Smith (FSM) is 1147 miles / 1846 kilometers and travel time by car is about 19 hours 45 minutes.

Map of flight path and driving directions from Washington D.C. to Fort Smith.

Shortest flight path between Washington Dulles International Airport (IAD) and Fort Smith Regional Airport (FSM).

How far is Fort Smith from Washington D.C.?

There are several ways to calculate distances between Washington D.C. and Fort Smith. Here are two common methods:

Vincenty's formula (applied above)
  • 964.619 miles
  • 1552.404 kilometers
  • 838.231 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 962.640 miles
  • 1549.219 kilometers
  • 836.511 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).

Airport information


A 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

B Fort Smith Regional Airport
City: Fort Smith, AR
Country: United States Flag of United States
IATA Code: FSM
ICAO Code: KFSM
Coordinates: 35°20′11″N, 94°22′2″W

Time difference and current local times

The time difference between Washington D.C. and Fort Smith is 1 hour. Fort Smith is 1 hour behind Washington D.C..

Time Difference

Washington D.C.

 EDT

Fort Smith, AR

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 148 kg (327 pounds).

Frequent Flyer Miles Calculator

Washington D.C. (IAD) → Fort Smith (FSM).

Distance:
965
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
965

Round trip?