| Herndon to Southern Pines (North Carolina) | 283.66 mi (456.50 km) |
| Herndon to Southfield (Michigan) | 391.37 mi (629.85 km) |
| Herndon to Southgate (Michigan) | 378.24 mi (608.72 km) |
| Herndon to Southlake (Texas) | 1,177.82 mi (1,895.52 km) |
| Herndon to Spanaway (Washington) | 2,308.80 mi (3,715.65 km) |
| Herndon to Spanish Fork (Utah) | 1,815.54 mi (2,921.84 km) |
| Herndon to Spanish Lake (Missouri) | 689.15 mi (1,109.08 km) |
| Herndon to Spanish Springs (Nevada) | 2,239.55 mi (3,604.21 km) |
| Herndon to Sparks (Nevada) | 2,243.24 mi (3,610.15 km) |
| Herndon to Spartanburg (South Carolina) | 374.26 mi (602.32 km) |
| Herndon to Spearfish (South Dakota) | 1,408.20 mi (2,266.28 km) |
| Herndon to Speedway (Indiana) | 476.45 mi (766.77 km) |
| Herndon to Spencer (Iowa) | 967.40 mi (1,556.88 km) |
| Herndon to Spokane (Washington) | 2,075.10 mi (3,339.55 km) |
| Herndon to Spokane Valley (Washington) | 2,065.86 mi (3,324.69 km) |
