| Merthyr Tudful to Seymour (Tennessee) | 3,941.49 mi (6,343.21 km) |
| Merthyr Tudful to Shady Hills (Florida) | 4,255.00 mi (6,847.77 km) |
| Merthyr Tudful to Shafter (California) | 5,274.73 mi (8,488.85 km) |
| Merthyr Tudful to Shaker Heights (Ohio) | 3,595.42 mi (5,786.27 km) |
| Merthyr Tudful to Shakopee (Minnesota) | 3,902.05 mi (6,279.75 km) |
| Merthyr Tudful to Sharon (Pennsylvania) | 3,564.13 mi (5,735.91 km) |
| Merthyr Tudful to Sharonville (Ohio) | 3,808.20 mi (6,128.71 km) |
| Merthyr Tudful to Shasta Lake (California) | 5,077.66 mi (8,171.70 km) |
| Merthyr Tudful to Shawnee (Kansas) | 4,225.89 mi (6,800.91 km) |
| Merthyr Tudful to Shawnee (Oklahoma) | 4,490.45 mi (7,226.68 km) |
| Merthyr Tudful to Sheboygan (Wisconsin) | 3,735.26 mi (6,011.31 km) |
| Merthyr Tudful to Shelby (North Carolina) | 3,878.32 mi (6,241.55 km) |
| Merthyr Tudful to Shelbyville (Indiana) | 3,851.05 mi (6,197.66 km) |
| Merthyr Tudful to Shelbyville (Kentucky) | 3,890.94 mi (6,261.86 km) |
| Merthyr Tudful to Shelbyville (Tennessee) | 4,068.51 mi (6,547.63 km) |
