Distance from Dallas to San Antonio
The distance from Dallas to San Antonio is 406 km (252 miles) as the crow flies.
San Antonio lies southwest of Dallas.
Dallas (United States): 32.78° N, 96.81° W
San Antonio (United States): 29.43° N, 98.49° W
Cities near Dallas
Cities near San Antonio
Similar distances from Dallas
How we calculate the distance between two cities
The distance between two cities is calculated using the Haversine formula, which determines the great-circle distance between two points on a sphere given their latitude and longitude coordinates. This formula accounts for the Earth's curvature to provide an accurate "as the crow flies" distance. The Earth's radius used in our calculations is 6,371 kilometers (3,959 miles). The result represents the shortest path between two cities over the Earth's surface, not the driving or walking distance.