Air Miles Calculator

Distance between Watertown, NY (ART) and Decatur, IL (DEC)

Flight distance from Watertown to Decatur (Watertown International Airport – Decatur Airport) is 721 miles / 1160 kilometers / 626 nautical miles. Estimated flight time is 1 hour 51 minutes.

Driving distance from Watertown (ART) to Decatur (DEC) is 879 miles / 1415 kilometers and travel time by car is about 15 hours 43 minutes.

Map of flight path and driving directions from Watertown to Decatur.

Shortest flight path between Watertown International Airport (ART) and Decatur Airport (DEC).

How far is Decatur from Watertown?

There are several ways to calculate distances between Watertown and Decatur. Here are two common methods:

Vincenty's formula (applied above)
  • 720.589 miles
  • 1159.676 kilometers
  • 626.175 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
  • 719.135 miles
  • 1157.335 kilometers
  • 624.911 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 Watertown International Airport
City: Watertown, NY
Country: United States Flag of United States
IATA Code: ART
ICAO Code: KART
Coordinates: 43°59′30″N, 76°1′18″W

B Decatur Airport
City: Decatur, IL
Country: United States Flag of United States
IATA Code: DEC
ICAO Code: KDEC
Coordinates: 39°50′4″N, 88°51′56″W

Time difference and current local times

The time difference between Watertown and Decatur is 1 hour. Decatur is 1 hour behind Watertown.

Time Difference

Watertown, NY

 EDT

Decatur, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 127 kg (280 pounds).

Frequent Flyer Miles Calculator

Watertown (ART) → Decatur (DEC).

Distance:
721
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
721

Round trip?