| Merthyr Tudful to Santa Rosa (California) | 5,215.21 mi (8,393.07 km) |
| Merthyr Tudful to Santaquin (Utah) | 4,783.72 mi (7,698.65 km) |
| Merthyr Tudful to Santee (California) | 5,349.58 mi (8,609.31 km) |
| Merthyr Tudful to Sapulpa (Oklahoma) | 4,424.20 mi (7,120.06 km) |
| Merthyr Tudful to Saraland (Alabama) | 4,363.77 mi (7,022.81 km) |
| Merthyr Tudful to Sarasota (Florida) | 4,308.21 mi (6,933.39 km) |
| Merthyr Tudful to Sarasota Springs (Florida) | 4,306.82 mi (6,931.16 km) |
| Merthyr Tudful to Saratoga (California) | 5,261.95 mi (8,468.29 km) |
| Merthyr Tudful to Saratoga Springs (New York) | 3,215.03 mi (5,174.08 km) |
| Merthyr Tudful to Saratoga Springs (Utah) | 4,767.64 mi (7,672.77 km) |
| Merthyr Tudful to Sartell (Minnesota) | 3,889.95 mi (6,260.27 km) |
| Merthyr Tudful to Satellite Beach (Florida) | 4,184.33 mi (6,734.03 km) |
| Merthyr Tudful to Sauk Rapids (Minnesota) | 3,888.50 mi (6,257.94 km) |
| Merthyr Tudful to Sault Ste. Marie (Michigan) | 3,488.78 mi (5,614.66 km) |
| Merthyr Tudful to Savage (Minnesota) | 3,898.82 mi (6,274.55 km) |
