| Herndon to Sugar Hill (Georgia) | 499.64 mi (804.09 km) |
| Herndon to Sugar Land (Texas) | 1,223.28 mi (1,968.67 km) |
| Herndon to Sugarland Run (Virginia) | 4.25 mi (6.84 km) |
| Herndon to Sugarmill Woods (Florida) | 765.60 mi (1,232.12 km) |
| Herndon to Suisun City (California) | 2,385.16 mi (3,838.55 km) |
| Herndon to Suitland (Maryland) | 26.31 mi (42.35 km) |
| Herndon to Sulphur (Louisiana) | 1,088.16 mi (1,751.23 km) |
| Herndon to Sulphur Springs (Texas) | 1,092.33 mi (1,757.93 km) |
| Herndon to Summerfield (Maryland) | 28.25 mi (45.47 km) |
| Herndon to Summerfield (North Carolina) | 235.84 mi (379.55 km) |
| Herndon to Summerlin South (Nevada) | 2,072.97 mi (3,336.12 km) |
| Herndon to Summerville (South Carolina) | 440.88 mi (709.53 km) |
| Herndon to Summit (Illinois) | 581.90 mi (936.48 km) |
| Herndon to Summit (New Jersey) | 200.59 mi (322.83 km) |
| Herndon to Sumner (Washington) | 2,299.54 mi (3,700.75 km) |
