| Herndon to Sestu | 4,435.53 mi (7,138.29 km) |
| Herndon to Settimo Torinese | 4,181.70 mi (6,729.80 km) |
| Herndon to Seveso | 4,224.56 mi (6,798.77 km) |
| Herndon to Sezze | 4,536.79 mi (7,301.26 km) |
| Herndon to Siano | 4,634.14 mi (7,457.93 km) |
| Herndon to Siena | 4,396.61 mi (7,075.66 km) |
| Herndon to Signa | 4,370.64 mi (7,033.86 km) |
| Herndon to Silea | 4,358.33 mi (7,014.05 km) |
| Herndon to Silvi Paese | 4,544.86 mi (7,314.24 km) |
| Herndon to Sinalunga | 4,417.63 mi (7,109.50 km) |
| Herndon to Siniscola | 4,418.68 mi (7,111.18 km) |
| Herndon to Sinnai | 4,440.54 mi (7,146.36 km) |
| Herndon to Siracusa | 4,802.22 mi (7,728.43 km) |
| Herndon to Solaro | 4,223.18 mi (6,796.55 km) |
| Herndon to Soliera | 4,330.83 mi (6,969.79 km) |
