| Herndon to Superior (Colorado) | 1,477.18 mi (2,377.30 km) |
| Herndon to Superior (Wisconsin) | 913.71 mi (1,470.48 km) |
| Herndon to Surprise (Arizona) | 1,973.27 mi (3,175.67 km) |
| Herndon to Susanville (California) | 2,277.18 mi (3,664.76 km) |
| Herndon to Sussex (Wisconsin) | 633.01 mi (1,018.73 km) |
| Herndon to Suwanee (Georgia) | 502.92 mi (809.37 km) |
| Herndon to Swansea (Illinois) | 678.88 mi (1,092.55 km) |
| Herndon to Sweetwater (Florida) | 927.82 mi (1,493.18 km) |
| Herndon to Sweetwater (Texas) | 1,362.84 mi (2,193.28 km) |
| Herndon to Sycamore (Illinois) | 628.75 mi (1,011.87 km) |
| Herndon to Sylacauga (Alabama) | 636.40 mi (1,024.19 km) |
| Herndon to Sylvania (Ohio) | 382.88 mi (616.19 km) |
| Herndon to Syosset (New York) | 242.19 mi (389.76 km) |
| Herndon to Syracuse (New York) | 288.63 mi (464.50 km) |
| Herndon to Syracuse (Utah) | 1,828.68 mi (2,942.98 km) |
