How far is Decatur, IL, from Quincy, IL?

The distance between Quincy (Quincy Regional Airport) and Decatur (Decatur Airport) is 124 miles / 200 kilometers / 108 nautical miles.

The driving distance from Quincy (UIN) to Decatur (DEC) is 160 miles / 258 kilometers, and travel time by car is about 3 hours 1 minutes.

Distance from Quincy to Decatur

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

Vincenty's formula (applied above)

• 123.996 miles
• 199.552 kilometers
• 107.750 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

• 123.689 miles
• 199.058 kilometers
• 107.482 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 Quincy to Decatur?

The estimated flight time from Quincy Regional Airport to Decatur Airport is 44 minutes.

What is the time difference between Quincy and Decatur?

There is no time difference between Quincy and Decatur.

Flight carbon footprint between Quincy Regional Airport (UIN) and Decatur Airport (DEC)

On average, flying from Quincy to Decatur generates about 43 kg of CO2 per passenger, and 43 kilograms equals 95 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Quincy to Decatur

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

Airport information

Origin	Quincy Regional Airport
City:	Quincy, IL
Country:	United States
IATA Code:	UIN
ICAO Code:	KUIN
Coordinates:	39°56′33″N, 91°11′40″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