how far is austin tx from san marcos tx
Distance from Austin, TX to San Marcos, TX. The total distance from Austin, TX to San Marcos, TX is 29 miles. This is equivalent to 47 kilometers or 25 nautical miles. Your trip begins in Austin, Texas. It ends in San Marcos, Texas. Your flight direction from Austin, TX to San Marcos, TX is Southwest (-156 degrees from North). The distance calculator helps you figure out how far it is to fly from Austin, TX to San Marcos, TX. It does this by computing the straight line flying distance (as the crow flies).