| San Marcos to Altus (Oklahoma) | 1,028.78 mi (1,655.66 km) |
| San Marcos to Alum Rock (California) | 392.84 mi (632.22 km) |
| San Marcos to Alvin (Texas) | 1,315.42 mi (2,116.96 km) |
| San Marcos to Amarillo (Texas) | 887.70 mi (1,428.61 km) |
| San Marcos to Amelia (Ohio) | 1,873.74 mi (3,015.49 km) |
| San Marcos to American Canyon (California) | 450.33 mi (724.73 km) |
| San Marcos to American Fork (Utah) | 582.05 mi (936.73 km) |
| San Marcos to Americus (Georgia) | 1,911.33 mi (3,075.98 km) |
| San Marcos to Ames (Iowa) | 1,422.14 mi (2,288.71 km) |
| San Marcos to Amherst (Ohio) | 1,989.39 mi (3,201.61 km) |
| San Marcos to Ammon (Idaho) | 767.94 mi (1,235.88 km) |
| San Marcos to Amsterdam (New York) | 2,406.69 mi (3,873.20 km) |
| San Marcos to Anacortes (Washington) | 1,097.73 mi (1,766.62 km) |
| San Marcos to Anaheim (California) | 62.57 mi (100.70 km) |
| San Marcos to Anchorage (Alaska) | 2,400.86 mi (3,863.81 km) |
