Air Miles Calculator

Distance between San Francisco, CA (SFO) and Decatur, IL (DEC)

Flight distance from San Francisco to Decatur (San Francisco International Airport – Decatur Airport) is 1806 miles / 2907 kilometers / 1570 nautical miles. Estimated flight time is 3 hours 55 minutes.

Driving distance from San Francisco (SFO) to Decatur (DEC) is 2098 miles / 3377 kilometers and travel time by car is about 34 hours 27 minutes.

Map of flight path and driving directions from San Francisco to Decatur.

Shortest flight path between San Francisco International Airport (SFO) and Decatur Airport (DEC).

How far is Decatur from San Francisco?

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

Vincenty's formula (applied above)
  • 1806.473 miles
  • 2907.236 kilometers
  • 1569.782 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
  • 1802.142 miles
  • 2900.267 kilometers
  • 1566.019 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 San Francisco International Airport
City: San Francisco, CA
Country: United States Flag of United States
IATA Code: SFO
ICAO Code: KSFO
Coordinates: 37°37′8″N, 122°22′30″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

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

Time Difference

San Francisco, CA

 PDT

Decatur, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 201 kg (442 pounds).

Frequent Flyer Miles Calculator

San Francisco (SFO) → Decatur (DEC).

Distance:
1806
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1806

Round trip?