| San Marcos to Salisbury (Maryland) | 2,339.87 mi (3,765.66 km) |
| San Marcos to Salisbury (New York) | 2,439.28 mi (3,925.65 km) |
| San Marcos to Salisbury (North Carolina) | 2,086.55 mi (3,357.97 km) |
| San Marcos to Salmon Creek (Washington) | 916.32 mi (1,474.67 km) |
| San Marcos to Salt Lake City (Utah) | 601.90 mi (968.67 km) |
| San Marcos to Sammamish (Washington) | 1,031.32 mi (1,659.76 km) |
| San Marcos to San Angelo (Texas) | 982.74 mi (1,581.57 km) |
| San Marcos to San Anselmo (California) | 451.64 mi (726.84 km) |
| San Marcos to San Antonio (Texas) | 1,128.26 mi (1,815.76 km) |
| San Marcos to San Benito (Texas) | 1,266.24 mi (2,037.82 km) |
| San Marcos to San Bernardino (California) | 69.89 mi (112.48 km) |
| San Marcos to San Bruno (California) | 428.76 mi (690.03 km) |
| San Marcos to San Buenaventura (California) | 142.03 mi (228.58 km) |
| San Marcos to San Carlos (California) | 416.20 mi (669.81 km) |
| San Marcos to San Carlos Park (Florida) | 2,158.31 mi (3,473.47 km) |
