# 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
Coordinates: 38°56′40″N, 77°27′20″W

B Fort Smith Regional Airport
City: Fort Smith, AR
Country: 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..

EDT

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?