| San Marcos to Santa Rosa (California) | 480.19 mi (772.80 km) |
| San Marcos to Santaquin (Utah) | 558.52 mi (898.85 km) |
| San Marcos to Santee (California) | 22.21 mi (35.75 km) |
| San Marcos to Sapulpa (Oklahoma) | 1,212.82 mi (1,951.84 km) |
| San Marcos to Saraland (Alabama) | 1,705.59 mi (2,744.89 km) |
| San Marcos to Sarasota (Florida) | 2,095.87 mi (3,372.98 km) |
| San Marcos to Sarasota Springs (Florida) | 2,100.53 mi (3,380.48 km) |
| San Marcos to Saratoga (California) | 395.61 mi (636.67 km) |
| San Marcos to Saratoga Springs (New York) | 2,427.81 mi (3,907.18 km) |
| San Marcos to Saratoga Springs (Utah) | 576.74 mi (928.17 km) |
| San Marcos to Sartell (Minnesota) | 1,490.20 mi (2,398.25 km) |
| San Marcos to Satellite Beach (Florida) | 2,189.41 mi (3,523.52 km) |
| San Marcos to Sauk Rapids (Minnesota) | 1,492.42 mi (2,401.81 km) |
| San Marcos to Sault Ste. Marie (Michigan) | 1,950.56 mi (3,139.13 km) |
| San Marcos to Savage (Minnesota) | 1,501.91 mi (2,417.09 km) |
