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How far is Williamsport, PA, from Decatur, IL?

The distance between Decatur (Decatur Airport) and Williamsport (Williamsport Regional Airport) is 636 miles / 1023 kilometers / 552 nautical miles.

The driving distance from Decatur (DEC) to Williamsport (IPT) is 734 miles / 1182 kilometers, and travel time by car is about 13 hours 44 minutes.

Decatur Airport – Williamsport Regional Airport

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636
Miles
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1023
Kilometers
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552
Nautical miles

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Distance from Decatur to Williamsport

There are several ways to calculate the distance from Decatur to Williamsport. Here are two standard methods:

Vincenty's formula (applied above)
  • 635.718 miles
  • 1023.089 kilometers
  • 552.424 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
  • 634.167 miles
  • 1020.593 kilometers
  • 551.076 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 Decatur to Williamsport?

The estimated flight time from Decatur Airport to Williamsport Regional Airport is 1 hour and 42 minutes.

Flight carbon footprint between Decatur Airport (DEC) and Williamsport Regional Airport (IPT)

On average, flying from Decatur to Williamsport generates about 117 kg of CO2 per passenger, and 117 kilograms equals 258 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Decatur to Williamsport

See the map of the shortest flight path between Decatur Airport (DEC) and Williamsport Regional Airport (IPT).

Airport information

Origin 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
Destination Williamsport Regional Airport
City: Williamsport, PA
Country: United States Flag of United States
IATA Code: IPT
ICAO Code: KIPT
Coordinates: 41°14′30″N, 76°55′15″W