How far is Decatur, IL, from Ontario, CA?
The distance between Ontario (Ontario International Airport) and Decatur (Decatur Airport) is 1632 miles / 2626 kilometers / 1418 nautical miles.
The driving distance from Ontario (ONT) to Decatur (DEC) is 1922 miles / 3093 kilometers, and travel time by car is about 33 hours 36 minutes.
Ontario International Airport – Decatur Airport
Search flights
Distance from Ontario to Decatur
There are several ways to calculate the distance from Ontario to Decatur. Here are two standard methods:
Vincenty's formula (applied above)- 1631.919 miles
- 2626.319 kilometers
- 1418.099 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- 1628.544 miles
- 2620.887 kilometers
- 1415.166 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 Ontario to Decatur?
The estimated flight time from Ontario International Airport to Decatur Airport is 3 hours and 35 minutes.
What is the time difference between Ontario and Decatur?
The time difference between Ontario and Decatur is 2 hours. Decatur is 2 hours ahead of Ontario.
Flight carbon footprint between Ontario International Airport (ONT) and Decatur Airport (DEC)
On average, flying from Ontario to Decatur generates about 188 kg of CO2 per passenger, and 188 kilograms equals 414 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Ontario to Decatur
See the map of the shortest flight path between Ontario International Airport (ONT) and Decatur Airport (DEC).
Airport information
| Origin | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States  |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″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 |