| San Marcos to Storm Lake (Iowa) | 1,360.83 mi (2,190.04 km) |
| San Marcos to Storrs (Connecticut) | 2,505.31 mi (4,031.91 km) |
| San Marcos to Stoughton (Wisconsin) | 1,654.70 mi (2,662.98 km) |
| San Marcos to Stow (Ohio) | 2,029.28 mi (3,265.81 km) |
| San Marcos to Streamwood (Illinois) | 1,692.24 mi (2,723.40 km) |
| San Marcos to Streator (Illinois) | 1,647.29 mi (2,651.05 km) |
| San Marcos to Streetsboro (Ohio) | 2,034.21 mi (3,273.74 km) |
| San Marcos to Strongsville (Ohio) | 2,009.46 mi (3,233.92 km) |
| San Marcos to Stuart (Florida) | 2,232.16 mi (3,592.31 km) |
| San Marcos to Stuarts Draft (Virginia) | 2,154.41 mi (3,467.19 km) |
| San Marcos to Sturgis (Michigan) | 1,829.19 mi (2,943.79 km) |
| San Marcos to Suamico (Wisconsin) | 1,742.55 mi (2,804.36 km) |
| San Marcos to Sudley (Virginia) | 2,235.29 mi (3,597.35 km) |
| San Marcos to Suffern (New York) | 2,408.31 mi (3,875.80 km) |
| San Marcos to Suffolk (Virginia) | 2,292.66 mi (3,689.68 km) |
