| Potomac to Sacile | 4,346.35 mi (6,994.77 km) |
| Potomac to Sala Consilina | 4,678.91 mi (7,529.98 km) |
| Potomac to Salemi | 4,649.41 mi (7,482.51 km) |
| Potomac to Salerno | 4,631.32 mi (7,453.38 km) |
| Potomac to Salo | 4,275.47 mi (6,880.71 km) |
| Potomac to Salsomaggiore Terme | 4,277.53 mi (6,884.01 km) |
| Potomac to Saluzzo | 4,174.90 mi (6,718.86 km) |
| Potomac to Salzano | 4,344.83 mi (6,992.33 km) |
| Potomac to Samarate | 4,200.15 mi (6,759.48 km) |
| Potomac to San Benedetto del Tronto | 4,510.22 mi (7,258.50 km) |
| Potomac to San Biagio di Callalta | 4,350.82 mi (7,001.97 km) |
| Potomac to San Bonifacio | 4,313.98 mi (6,942.68 km) |
| Potomac to San Casciano in Val di Pesa | 4,368.52 mi (7,030.45 km) |
| Potomac to San Cataldo | 4,716.27 mi (7,590.10 km) |
| Potomac to San Cesareo | 4,503.43 mi (7,247.58 km) |
