How far is San Antonio, TX, from Champaign, IL?
The distance between Champaign (University of Illinois Willard Airport) and San Antonio (San Antonio International Airport) is 926 miles / 1491 kilometers / 805 nautical miles.
The driving distance from Champaign (CMI) to San Antonio (SAT) is 1087 miles / 1750 kilometers, and travel time by car is about 19 hours 29 minutes.
University of Illinois Willard Airport – San Antonio International Airport
Search flights
Distance from Champaign to San Antonio
There are several ways to calculate the distance from Champaign to San Antonio. Here are two standard methods:
Vincenty's formula (applied above)- 926.168 miles
- 1490.523 kilometers
- 804.818 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- 926.690 miles
- 1491.364 kilometers
- 805.272 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 Champaign to San Antonio?
The estimated flight time from University of Illinois Willard Airport to San Antonio International Airport is 2 hours and 15 minutes.
What is the time difference between Champaign and San Antonio?
There is no time difference between Champaign and San Antonio.
Flight carbon footprint between University of Illinois Willard Airport (CMI) and San Antonio International Airport (SAT)
On average, flying from Champaign to San Antonio generates about 146 kg of CO2 per passenger, and 146 kilograms equals 321 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Champaign to San Antonio
See the map of the shortest flight path between University of Illinois Willard Airport (CMI) and San Antonio International Airport (SAT).
Airport information
| Origin | University of Illinois Willard Airport |
|---|---|
| City: | Champaign, IL |
| Country: | United States  |
| IATA Code: | CMI |
| ICAO Code: | KCMI |
| Coordinates: | 40°2′21″N, 88°16′41″W |
| Destination | San Antonio International Airport |
|---|---|
| City: | San Antonio, TX |
| Country: | United States |
| IATA Code: | SAT |
| ICAO Code: | KSAT |
| Coordinates: | 29°32′1″N, 98°28′11″W |