How far is Decatur, IL, from Reading, PA?
The distance between Reading (Reading Regional Airport) and Decatur (Decatur Airport) is 684 miles / 1101 kilometers / 594 nautical miles.
The driving distance from Reading (RDG) to Decatur (DEC) is 772 miles / 1242 kilometers, and travel time by car is about 14 hours 42 minutes.
Reading Regional Airport – Decatur Airport
Search flights
Distance from Reading to Decatur
There are several ways to calculate the distance from Reading to Decatur. Here are two standard methods:
Vincenty's formula (applied above)- 683.873 miles
- 1100.588 kilometers
- 594.270 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- 682.168 miles
- 1097.842 kilometers
- 592.787 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 Reading to Decatur?
The estimated flight time from Reading Regional Airport to Decatur Airport is 1 hour and 47 minutes.
What is the time difference between Reading and Decatur?
The time difference between Reading and Decatur is 1 hour. Decatur is 1 hour behind Reading.
Flight carbon footprint between Reading Regional Airport (RDG) and Decatur Airport (DEC)
On average, flying from Reading to Decatur generates about 123 kg of CO2 per passenger, and 123 kilograms equals 271 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Reading to Decatur
See the map of the shortest flight path between Reading Regional Airport (RDG) and Decatur Airport (DEC).
Airport information
| Origin | Reading Regional Airport |
|---|---|
| City: | Reading, PA |
| Country: | United States  |
| IATA Code: | RDG |
| ICAO Code: | KRDG |
| Coordinates: | 40°22′42″N, 75°57′54″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 |