Air Miles Calculator

Distance between Spokane, WA (GEG) and Decatur, IL (DEC)

Distance from Spokane to Decatur (Spokane International Airport – Decatur Airport) is 1522 miles / 2449 kilometers / 1323 nautical miles.

How far is Decatur from Spokane?

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

Vincenty's formula (applied above)
  • 1521.958 miles
  • 2449.353 kilometers
  • 1322.545 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
  • 1518.497 miles
  • 2443.784 kilometers
  • 1319.538 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).

Flight duration

Estimated flight time from Spokane International Airport (GEG) to Decatur Airport (DEC) is 3 hours 22 minutes.

Time difference and current local times

The time difference between Spokane and Decatur is 2 hours. Decatur is 2 hours ahead of Spokane.

Time Difference

Spokane
Decatur

Spokane, WA

 PST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 166 kg (367 pounds).

Airport information


A Spokane International Airport
City: Spokane, WA
Country: United States Flag of United States
IATA Code: GEG
ICAO Code: KGEG
Coordinates: 47°37′11″N, 117°32′2″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

Map

Spokane to Decatur flight map.

Frequent Flyer Miles Calculator

Spokane (GEG) → Decatur (DEC).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1522
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1522

Round trip?