| Llanelli to Sinop | 1,945.96 mi (3,131.72 km) |
| Llanelli to Siran | 2,188.32 mi (3,521.76 km) |
| Llanelli to Sirnak | 2,442.75 mi (3,931.23 km) |
| Llanelli to Sirvan | 2,400.93 mi (3,863.92 km) |
| Llanelli to Sivas | 2,116.30 mi (3,405.86 km) |
| Llanelli to Sivasli | 1,862.70 mi (2,997.72 km) |
| Llanelli to Siverek | 2,298.95 mi (3,699.80 km) |
| Llanelli to Sivrice | 2,268.75 mi (3,651.19 km) |
| Llanelli to Sivrihisar | 1,897.40 mi (3,053.57 km) |
| Llanelli to Sogut | 1,816.44 mi (2,923.28 km) |
| Llanelli to Sogutlu | 1,792.38 mi (2,884.56 km) |
| Llanelli to Soke | 1,803.49 mi (2,902.44 km) |
| Llanelli to Solhan | 2,321.01 mi (3,735.31 km) |
| Llanelli to Soma | 1,746.02 mi (2,809.94 km) |
| Llanelli to Sorgun | 2,036.03 mi (3,276.67 km) |
