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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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.
What is the time difference between Decatur and Williamsport?
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  |
| 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 |
| IATA Code: | IPT |
| ICAO Code: | KIPT |
| Coordinates: | 41°14′30″N, 76°55′15″W |