| Merthyr Tudful to Saddlebrooke (Arizona) | 5,153.87 mi (8,294.35 km) |
| Merthyr Tudful to Safety Harbor (Florida) | 4,281.09 mi (6,889.76 km) |
| Merthyr Tudful to Saginaw (Michigan) | 3,604.21 mi (5,800.42 km) |
| Merthyr Tudful to Saginaw (Texas) | 4,632.55 mi (7,455.38 km) |
| Merthyr Tudful to Sahuarita (Arizona) | 5,191.31 mi (8,354.61 km) |
| Merthyr Tudful to Saks (Alabama) | 4,130.64 mi (6,647.62 km) |
| Merthyr Tudful to Salem (Massachusetts) | 3,120.31 mi (5,021.66 km) |
| Merthyr Tudful to Salem (Ohio) | 3,592.66 mi (5,781.83 km) |
| Merthyr Tudful to Salem (Oregon) | 4,854.95 mi (7,813.29 km) |
| Merthyr Tudful to Salem (Virginia) | 3,724.02 mi (5,993.23 km) |
| Merthyr Tudful to Salem Lakes (Wisconsin) | 3,804.86 mi (6,123.33 km) |
| Merthyr Tudful to Salida (California) | 5,207.75 mi (8,381.06 km) |
| Merthyr Tudful to Salina (Kansas) | 4,341.54 mi (6,987.03 km) |
| Merthyr Tudful to Salinas (California) | 5,282.94 mi (8,502.08 km) |
| Merthyr Tudful to Salisbury (Maryland) | 3,490.59 mi (5,617.55 km) |
