| Potomac to Sangeorgiu de Mures | 4,807.06 mi (7,736.22 km) |
| Potomac to Sangeorz-Bai | 4,782.22 mi (7,696.24 km) |
| Potomac to Sannicolau Mare | 4,674.92 mi (7,523.55 km) |
| Potomac to Santana | 4,699.12 mi (7,562.51 km) |
| Potomac to Satu Mare | 4,697.23 mi (7,559.47 km) |
| Potomac to Scobinti | 4,866.71 mi (7,832.21 km) |
| Potomac to Scornicesti | 4,890.78 mi (7,870.94 km) |
| Potomac to Sebes | 4,795.90 mi (7,718.25 km) |
| Potomac to Seini | 4,714.01 mi (7,586.47 km) |
| Potomac to Sfantu-Gheorghe | 4,886.03 mi (7,863.31 km) |
| Potomac to Sibiu | 4,825.39 mi (7,765.71 km) |
| Potomac to Sighetu Marmatiei | 4,730.01 mi (7,612.21 km) |
| Potomac to Sighisoara | 4,833.07 mi (7,778.08 km) |
| Potomac to Simeria | 4,778.29 mi (7,689.92 km) |
| Potomac to Sinaia | 4,898.07 mi (7,882.69 km) |
