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

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

The driving distance from Decatur (DEC) to Quincy (UIN) is 161 miles / 259 kilometers, and travel time by car is about 3 hours 1 minutes.

Distance from Decatur to Quincy

There are several ways to calculate the distance from Decatur to Quincy. 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 Decatur to Quincy?

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

What is the time difference between Decatur and Quincy?

There is no time difference between Decatur and Quincy.

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

On average, flying from Decatur to Quincy 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 Decatur to Quincy

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

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