How far is Decatur, IL, from Dubuque, IA?

The distance between Dubuque (Dubuque Regional Airport) and Decatur (Decatur Airport) is 202 miles / 324 kilometers / 175 nautical miles.

The driving distance from Dubuque (DBQ) to Decatur (DEC) is 249 miles / 401 kilometers, and travel time by car is about 4 hours 49 minutes.

Distance from Dubuque to Decatur

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

Vincenty's formula (applied above)

• 201.598 miles
• 324.440 kilometers
• 175.184 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

• 201.675 miles
• 324.565 kilometers
• 175.251 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 Dubuque to Decatur?

The estimated flight time from Dubuque Regional Airport to Decatur Airport is 52 minutes.

What is the time difference between Dubuque and Decatur?

There is no time difference between Dubuque and Decatur.

Flight carbon footprint between Dubuque Regional Airport (DBQ) and Decatur Airport (DEC)

On average, flying from Dubuque to Decatur generates about 55 kg of CO2 per passenger, and 55 kilograms equals 121 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Dubuque to Decatur

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

Airport information

Origin	Dubuque Regional Airport
City:	Dubuque, IA
Country:	United States
IATA Code:	DBQ
ICAO Code:	KDBQ
Coordinates:	42°24′7″N, 90°42′34″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