| San Marcos to Abilene (Texas) | 1,012.62 mi (1,629.66 km) |
| San Marcos to Accokeek (Maryland) | 2,262.24 mi (3,640.72 km) |
| San Marcos to Acworth (Georgia) | 1,863.79 mi (2,999.49 km) |
| San Marcos to Ada (Oklahoma) | 1,178.63 mi (1,896.82 km) |
| San Marcos to Addison (Illinois) | 1,699.53 mi (2,735.12 km) |
| San Marcos to Addison (Texas) | 1,176.14 mi (1,892.82 km) |
| San Marcos to Adelanto (California) | 101.09 mi (162.69 km) |
| San Marcos to Adelphi (Maryland) | 2,263.22 mi (3,642.30 km) |
| San Marcos to Adrian (Michigan) | 1,900.15 mi (3,058.00 km) |
| San Marcos to Affton (Missouri) | 1,543.53 mi (2,484.07 km) |
| San Marcos to Agoura Hills (California) | 115.13 mi (185.29 km) |
| San Marcos to Aguadilla (Puerto Rico) | 3,240.36 mi (5,214.86 km) |
| San Marcos to Aiken (South Carolina) | 2,036.33 mi (3,277.15 km) |
| San Marcos to Akron (Ohio) | 2,024.25 mi (3,257.72 km) |
| San Marcos to Alabaster (Alabama) | 1,748.98 mi (2,814.72 km) |
