| San Marcos to Sugar Hill (Georgia) | 1,898.29 mi (3,055.01 km) |
| San Marcos to Sugar Land (Texas) | 1,291.62 mi (2,078.67 km) |
| San Marcos to Sugarland Run (Virginia) | 2,241.08 mi (3,606.66 km) |
| San Marcos to Sugarmill Woods (Florida) | 2,067.92 mi (3,327.99 km) |
| San Marcos to Suisun City (California) | 445.24 mi (716.54 km) |
| San Marcos to Suitland (Maryland) | 2,265.95 mi (3,646.70 km) |
| San Marcos to Sulphur (Louisiana) | 1,411.62 mi (2,271.79 km) |
| San Marcos to Sulphur Springs (Texas) | 1,245.26 mi (2,004.06 km) |
| San Marcos to Summerfield (Maryland) | 2,268.72 mi (3,651.15 km) |
| San Marcos to Summerfield (North Carolina) | 2,115.80 mi (3,405.06 km) |
| San Marcos to Summerlin South (Nevada) | 231.55 mi (372.64 km) |
| San Marcos to Summerville (South Carolina) | 2,130.66 mi (3,428.97 km) |
| San Marcos to Summit (Illinois) | 1,707.41 mi (2,747.80 km) |
| San Marcos to Summit (New Jersey) | 2,397.25 mi (3,858.00 km) |
| San Marcos to Sumner (Washington) | 1,008.52 mi (1,623.06 km) |
