| San Marcos to Scottsboro (Alabama) | 1,781.17 mi (2,866.52 km) |
| San Marcos to Scottsdale (Arizona) | 308.54 mi (496.55 km) |
| San Marcos to Scranton (Pennsylvania) | 2,329.14 mi (3,748.39 km) |
| San Marcos to Seabrook (Maryland) | 2,269.44 mi (3,652.30 km) |
| San Marcos to Seabrook (Texas) | 1,327.28 mi (2,136.05 km) |
| San Marcos to Seaford (New York) | 2,443.03 mi (3,931.68 km) |
| San Marcos to Seagoville (Texas) | 1,195.33 mi (1,923.70 km) |
| San Marcos to Seal Beach (California) | 67.12 mi (108.02 km) |
| San Marcos to Searcy (Arkansas) | 1,457.21 mi (2,345.16 km) |
| San Marcos to Seaside (California) | 356.84 mi (574.27 km) |
| San Marcos to SeaTac (Washington) | 1,024.31 mi (1,648.47 km) |
| San Marcos to Seattle (Washington) | 1,036.34 mi (1,667.83 km) |
| San Marcos to Sebastian (Florida) | 2,205.05 mi (3,548.68 km) |
| San Marcos to Sebring (Florida) | 2,155.75 mi (3,469.35 km) |
| San Marcos to Secaucus (New Jersey) | 2,412.77 mi (3,882.98 km) |
