| Hwlffordd to Sinop | 1,980.97 mi (3,188.07 km) |
| Hwlffordd to Siran | 2,223.29 mi (3,578.04 km) |
| Hwlffordd to Sirnak | 2,477.82 mi (3,987.66 km) |
| Hwlffordd to Sirvan | 2,435.96 mi (3,920.30 km) |
| Hwlffordd to Sivas | 2,151.49 mi (3,462.49 km) |
| Hwlffordd to Sivasli | 1,898.11 mi (3,054.71 km) |
| Hwlffordd to Siverek | 2,334.20 mi (3,756.54 km) |
| Hwlffordd to Sivrice | 2,303.93 mi (3,707.82 km) |
| Hwlffordd to Sivrihisar | 1,932.84 mi (3,110.60 km) |
| Hwlffordd to Sogut | 1,851.88 mi (2,980.32 km) |
| Hwlffordd to Sogutlu | 1,827.79 mi (2,941.55 km) |
| Hwlffordd to Soke | 1,838.72 mi (2,959.13 km) |
| Hwlffordd to Solhan | 2,356.00 mi (3,791.61 km) |
| Hwlffordd to Soma | 1,781.39 mi (2,866.87 km) |
| Hwlffordd to Sorgun | 2,071.32 mi (3,333.47 km) |
