| Merthyr Tudful to Shelton (Connecticut) | 3,262.32 mi (5,250.20 km) |
| Merthyr Tudful to Shelton (Washington) | 4,727.61 mi (7,608.35 km) |
| Merthyr Tudful to Shenandoah (Louisiana) | 4,504.58 mi (7,249.42 km) |
| Merthyr Tudful to Shepherdsville (Kentucky) | 3,920.34 mi (6,309.18 km) |
| Merthyr Tudful to Sheridan (Wyoming) | 4,370.35 mi (7,033.40 km) |
| Merthyr Tudful to Sherman (Texas) | 4,564.73 mi (7,346.22 km) |
| Merthyr Tudful to Sherrelwood (Colorado) | 4,557.89 mi (7,335.22 km) |
| Merthyr Tudful to Sherwood (Arkansas) | 4,329.97 mi (6,968.41 km) |
| Merthyr Tudful to Sherwood (Oregon) | 4,825.19 mi (7,765.39 km) |
| Merthyr Tudful to Shiloh (Illinois) | 4,059.86 mi (6,533.72 km) |
| Merthyr Tudful to Shiloh (Ohio) | 3,776.73 mi (6,078.07 km) |
| Merthyr Tudful to Shiloh (Pennsylvania) | 3,469.49 mi (5,583.61 km) |
| Merthyr Tudful to Shirley (New York) | 3,273.19 mi (5,267.68 km) |
| Merthyr Tudful to Shively (Kentucky) | 3,914.73 mi (6,300.16 km) |
| Merthyr Tudful to Shoreline (Washington) | 4,676.48 mi (7,526.07 km) |
