Air Miles Calculator

Distance between Houston, TX (IAH) and Decatur, IL (DEC)

Flight distance from Houston to Decatur (Houston George Bush Intercontinental Airport – Decatur Airport) is 772 miles / 1242 kilometers / 671 nautical miles. Estimated flight time is 1 hour 57 minutes.

Driving distance from Houston (IAH) to Decatur (DEC) is 910 miles / 1465 kilometers and travel time by car is about 16 hours 33 minutes.

Map of flight path and driving directions from Houston to Decatur.

Shortest flight path between Houston George Bush Intercontinental Airport (IAH) and Decatur Airport (DEC).

How far is Decatur from Houston?

There are several ways to calculate distances between Houston and Decatur. Here are two common methods:

Vincenty's formula (applied above)
  • 771.640 miles
  • 1241.833 kilometers
  • 670.536 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 772.630 miles
  • 1243.428 kilometers
  • 671.398 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).

Airport information


A Houston George Bush Intercontinental Airport
City: Houston, TX
Country: United States Flag of United States
IATA Code: IAH
ICAO Code: KIAH
Coordinates: 29°59′3″N, 95°20′29″W

B Decatur Airport
City: Decatur, IL
Country: United States Flag of United States
IATA Code: DEC
ICAO Code: KDEC
Coordinates: 39°50′4″N, 88°51′56″W

Time difference and current local times

There is no time difference between Houston and Decatur.

Time Difference

Houston, TX

 CST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 132 kg (291 pounds).

Frequent Flyer Miles Calculator

Houston (IAH) → Decatur (DEC).

Distance:
772
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
772

Round trip?