| Merthyr Tudful to Sugar Hill (Georgia) | 4,037.89 mi (6,498.36 km) |
| Merthyr Tudful to Sugar Land (Texas) | 4,732.58 mi (7,616.35 km) |
| Merthyr Tudful to Sugarland Run (Virginia) | 3,535.10 mi (5,689.20 km) |
| Merthyr Tudful to Sugarmill Woods (Florida) | 4,236.84 mi (6,818.53 km) |
| Merthyr Tudful to Suisun City (California) | 5,205.42 mi (8,377.31 km) |
| Merthyr Tudful to Suitland (Maryland) | 3,524.57 mi (5,672.25 km) |
| Merthyr Tudful to Sulphur (Louisiana) | 4,608.59 mi (7,416.81 km) |
| Merthyr Tudful to Sulphur Springs (Texas) | 4,549.94 mi (7,322.42 km) |
| Merthyr Tudful to Summerfield (Maryland) | 3,519.87 mi (5,664.69 km) |
| Merthyr Tudful to Summerfield (North Carolina) | 3,768.02 mi (6,064.04 km) |
| Merthyr Tudful to Summerlin South (Nevada) | 5,111.65 mi (8,226.41 km) |
| Merthyr Tudful to Summerville (South Carolina) | 3,930.69 mi (6,325.83 km) |
| Merthyr Tudful to Summit (Illinois) | 3,826.91 mi (6,158.82 km) |
| Merthyr Tudful to Summit (New Jersey) | 3,337.83 mi (5,371.71 km) |
| Merthyr Tudful to Sumner (Washington) | 4,703.63 mi (7,569.76 km) |
