How far is San Diego, CA, from Decatur, IL?
The distance between Decatur (Decatur Airport) and San Diego (San Diego International Airport) is 1647 miles / 2651 kilometers / 1431 nautical miles.
The driving distance from Decatur (DEC) to San Diego (SAN) is 1987 miles / 3198 kilometers, and travel time by car is about 34 hours 59 minutes.
Decatur Airport – San Diego International Airport
Search flights
Distance from Decatur to San Diego
There are several ways to calculate the distance from Decatur to San Diego. Here are two standard methods:
Vincenty's formula (applied above)- 1647.216 miles
- 2650.937 kilometers
- 1431.392 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- 1644.085 miles
- 2645.898 kilometers
- 1428.671 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 Decatur to San Diego?
The estimated flight time from Decatur Airport to San Diego International Airport is 3 hours and 37 minutes.
What is the time difference between Decatur and San Diego?
The time difference between Decatur and San Diego is 2 hours. San Diego is 2 hours behind Decatur.
Flight carbon footprint between Decatur Airport (DEC) and San Diego International Airport (SAN)
On average, flying from Decatur to San Diego generates about 189 kg of CO2 per passenger, and 189 kilograms equals 417 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Decatur to San Diego
See the map of the shortest flight path between Decatur Airport (DEC) and San Diego International Airport (SAN).
Airport information
| Origin | Decatur Airport |
|---|---|
| City: | Decatur, IL |
| Country: | United States  |
| IATA Code: | DEC |
| ICAO Code: | KDEC |
| Coordinates: | 39°50′4″N, 88°51′56″W |
| Destination | San Diego International Airport |
|---|---|
| City: | San Diego, CA |
| Country: | United States |
| IATA Code: | SAN |
| ICAO Code: | KSAN |
| Coordinates: | 32°44′0″N, 117°11′24″W |