# Distance between Redmond, OR (RDM) and Decatur, IL (DEC)

Flight distance from Redmond to Decatur (Roberts Field – Decatur Airport) is 1677 miles / 2700 kilometers / 1458 nautical miles. Estimated flight time is 3 hours 40 minutes.

Driving distance from Redmond (RDM) to Decatur (DEC) is 1978 miles / 3183 kilometers and travel time by car is about 33 hours 28 minutes.

## Map of flight path and driving directions from Redmond to Decatur.

Shortest flight path between Roberts Field (RDM) and Decatur Airport (DEC).

## How far is Decatur from Redmond?

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

Vincenty's formula (applied above)
• 1677.404 miles
• 2699.521 kilometers
• 1457.625 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
• 1673.221 miles
• 2692.789 kilometers
• 1453.989 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 Roberts Field
City: Redmond, OR
Country: United States
IATA Code: RDM
ICAO Code: KRDM
Coordinates: 44°15′14″N, 121°9′0″W

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

## Time difference and current local times

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

PDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 191 kg (421 pounds).

## Frequent Flyer Miles Calculator

Redmond (RDM) → Decatur (DEC).

Distance:
1677
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1677

Round trip?