| Round Rock to Sinop | 6,594.34 mi (10,612.56 km) |
| Round Rock to Siran | 6,821.77 mi (10,978.58 km) |
| Round Rock to Sirnak | 7,076.02 mi (11,387.76 km) |
| Round Rock to Sirvan | 7,031.74 mi (11,316.50 km) |
| Round Rock to Sivas | 6,777.98 mi (10,908.10 km) |
| Round Rock to Sivasli | 6,586.97 mi (10,600.70 km) |
| Round Rock to Siverek | 6,963.04 mi (11,205.92 km) |
| Round Rock to Sivrice | 6,924.28 mi (11,143.55 km) |
| Round Rock to Sivrihisar | 6,605.63 mi (10,630.73 km) |
| Round Rock to Sogut | 6,527.94 mi (10,505.71 km) |
| Round Rock to Sogutlu | 6,494.13 mi (10,451.29 km) |
| Round Rock to Soke | 6,537.03 mi (10,520.33 km) |
| Round Rock to Solhan | 6,950.34 mi (11,185.49 km) |
| Round Rock to Soma | 6,474.27 mi (10,419.33 km) |
| Round Rock to Sorgun | 6,713.65 mi (10,804.58 km) |
