How far is Decatur, IL, from Williamsport, PA?
The distance between Williamsport (Williamsport Regional Airport) and Decatur (Decatur Airport) is 636 miles / 1023 kilometers / 552 nautical miles.
The driving distance from Williamsport (IPT) to Decatur (DEC) is 733 miles / 1179 kilometers, and travel time by car is about 13 hours 45 minutes.
Williamsport Regional Airport – Decatur Airport
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Distance from Williamsport to Decatur
There are several ways to calculate the distance from Williamsport to Decatur. 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 Williamsport to Decatur?
The estimated flight time from Williamsport Regional Airport to Decatur Airport is 1 hour and 42 minutes.
What is the time difference between Williamsport and Decatur?
Flight carbon footprint between Williamsport Regional Airport (IPT) and Decatur Airport (DEC)
On average, flying from Williamsport to Decatur 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 Williamsport to Decatur
See the map of the shortest flight path between Williamsport Regional Airport (IPT) and Decatur Airport (DEC).
Airport information
| Origin | Williamsport Regional Airport |
|---|---|
| City: | Williamsport, PA |
| Country: | United States  |
| IATA Code: | IPT |
| ICAO Code: | KIPT |
| Coordinates: | 41°14′30″N, 76°55′15″W |
| Destination | Decatur Airport |
|---|---|
| City: | Decatur, IL |
| Country: | United States |
| IATA Code: | DEC |
| ICAO Code: | KDEC |
| Coordinates: | 39°50′4″N, 88°51′56″W |