| Herndon to San Luis Obispo (California) | 2,375.92 mi (3,823.67 km) |
| Herndon to San Marcos (California) | 2,240.67 mi (3,606.01 km) |
| Herndon to San Marcos (Texas) | 1,324.77 mi (2,132.00 km) |
| Herndon to San Marino (California) | 2,266.33 mi (3,647.30 km) |
| Herndon to San Mateo (California) | 2,414.30 mi (3,885.43 km) |
| Herndon to San Pablo (California) | 2,407.95 mi (3,875.22 km) |
| Herndon to San Rafael (California) | 2,416.82 mi (3,889.49 km) |
| Herndon to San Ramon (California) | 2,390.49 mi (3,847.13 km) |
| Herndon to San Tan Valley (Arizona) | 1,938.17 mi (3,119.19 km) |
| Herndon to Sand Springs (Oklahoma) | 1,043.15 mi (1,678.79 km) |
| Herndon to Sandusky (Ohio) | 328.48 mi (528.64 km) |
| Herndon to Sandy (Oregon) | 2,309.48 mi (3,716.74 km) |
| Herndon to Sandy (Utah) | 1,821.90 mi (2,932.07 km) |
| Herndon to Sandy Springs (Georgia) | 520.82 mi (838.17 km) |
| Herndon to Sanford (Florida) | 737.74 mi (1,187.27 km) |
