| Round Rock to Sangeorgiu de Mures | 6,005.77 mi (9,665.35 km) |
| Round Rock to Sangeorz-Bai | 5,974.37 mi (9,614.83 km) |
| Round Rock to Sannicolau Mare | 5,890.89 mi (9,480.47 km) |
| Round Rock to Santana | 5,910.14 mi (9,511.45 km) |
| Round Rock to Satu Mare | 5,893.29 mi (9,484.33 km) |
| Round Rock to Scobinti | 6,049.59 mi (9,735.87 km) |
| Round Rock to Scornicesti | 6,102.24 mi (9,820.61 km) |
| Round Rock to Sebes | 6,002.00 mi (9,659.29 km) |
| Round Rock to Seini | 5,908.88 mi (9,509.42 km) |
| Round Rock to Sfantu-Gheorghe | 6,084.21 mi (9,791.60 km) |
| Round Rock to Sibiu | 6,030.41 mi (9,705.01 km) |
| Round Rock to Sighetu Marmatiei | 5,921.25 mi (9,529.33 km) |
| Round Rock to Sighisoara | 6,032.79 mi (9,708.84 km) |
| Round Rock to Simeria | 5,987.19 mi (9,635.45 km) |
| Round Rock to Sinaia | 6,100.62 mi (9,818.00 km) |
