| Boulder to Sangeorgiu de Mures | 5,700.87 mi (9,174.67 km) |
| Boulder to Sangeorz-Bai | 5,661.25 mi (9,110.90 km) |
| Boulder to Sannicolau Mare | 5,615.04 mi (9,036.54 km) |
| Boulder to Santana | 5,626.07 mi (9,054.29 km) |
| Boulder to Satu Mare | 5,587.88 mi (8,992.83 km) |
| Boulder to Scobinti | 5,721.92 mi (9,208.54 km) |
| Boulder to Scornicesti | 5,813.45 mi (9,355.84 km) |
| Boulder to Sebes | 5,707.94 mi (9,186.04 km) |
| Boulder to Seini | 5,601.36 mi (9,014.52 km) |
| Boulder to Sfantu-Gheorghe | 5,776.36 mi (9,296.15 km) |
| Boulder to Sibiu | 5,733.96 mi (9,227.91 km) |
| Boulder to Sighetu Marmatiei | 5,608.40 mi (9,025.85 km) |
| Boulder to Sighisoara | 5,728.58 mi (9,219.25 km) |
| Boulder to Simeria | 5,697.73 mi (9,169.62 km) |
| Boulder to Sinaia | 5,798.57 mi (9,331.90 km) |
