| Potomac to San Vendemiano | 4,342.12 mi (6,987.97 km) |
| Potomac to San Vito al Tagliamento | 4,363.97 mi (7,023.12 km) |
| Potomac to San Vito dei Normanni | 4,761.34 mi (7,662.64 km) |
| Potomac to Sannicandro di Bari | 4,708.83 mi (7,578.13 km) |
| Potomac to Sannicandro Garganico | 4,623.90 mi (7,441.44 km) |
| Potomac to Sansepolcro | 4,412.89 mi (7,101.87 km) |
| Potomac to Sant'Agata de' Goti | 4,604.63 mi (7,410.43 km) |
| Potomac to Sant'Agata di Militello | 4,723.76 mi (7,602.16 km) |
| Potomac to Sant'Agnello | 4,617.28 mi (7,430.79 km) |
| Potomac to Sant'Ambrogio di Valpolicella | 4,290.96 mi (6,905.64 km) |
| Potomac to Sant'Anastasia | 4,608.54 mi (7,416.72 km) |
| Potomac to Sant'Angelo Lodigiano | 4,239.16 mi (6,822.27 km) |
| Potomac to Sant'Antimo | 4,598.46 mi (7,400.50 km) |
| Potomac to Sant'Antioco | 4,403.76 mi (7,087.17 km) |
| Potomac to Sant'Antonio Abate | 4,620.09 mi (7,435.32 km) |
