| Merthyr Tudful to Sarkisla | 2,074.05 mi (3,337.86 km) |
| Merthyr Tudful to Saruhanli | 1,734.04 mi (2,790.66 km) |
| Merthyr Tudful to Sason | 2,327.29 mi (3,745.42 km) |
| Merthyr Tudful to Savastepe | 1,708.31 mi (2,749.26 km) |
| Merthyr Tudful to Savsat | 2,251.35 mi (3,623.20 km) |
| Merthyr Tudful to Savur | 2,342.16 mi (3,769.35 km) |
| Merthyr Tudful to Sefaatli | 1,998.05 mi (3,215.55 km) |
| Merthyr Tudful to Seferhisar | 1,729.25 mi (2,782.96 km) |
| Merthyr Tudful to Selcuk | 1,762.29 mi (2,836.14 km) |
| Merthyr Tudful to Selcuklu | 1,974.35 mi (3,177.41 km) |
| Merthyr Tudful to Selendi | 1,786.49 mi (2,875.08 km) |
| Merthyr Tudful to Selim | 2,300.36 mi (3,702.07 km) |
| Merthyr Tudful to Semdinli | 2,508.91 mi (4,037.71 km) |
| Merthyr Tudful to Senirkent | 1,884.10 mi (3,032.17 km) |
| Merthyr Tudful to Senkaya | 2,277.61 mi (3,665.46 km) |
