| Merthyr Tudful to Savannah (Georgia) | 4,019.43 mi (6,468.64 km) |
| Merthyr Tudful to Sayreville (New Jersey) | 3,346.88 mi (5,386.28 km) |
| Merthyr Tudful to Sayville (New York) | 3,283.76 mi (5,284.70 km) |
| Merthyr Tudful to Scaggsville (Maryland) | 3,509.99 mi (5,648.79 km) |
| Merthyr Tudful to Scarsdale (New York) | 3,301.96 mi (5,313.99 km) |
| Merthyr Tudful to Schaumburg (Illinois) | 3,826.15 mi (6,157.60 km) |
| Merthyr Tudful to Schenectady (New York) | 3,232.04 mi (5,201.46 km) |
| Merthyr Tudful to Schererville (Indiana) | 3,826.41 mi (6,158.01 km) |
| Merthyr Tudful to Schertz (Texas) | 4,837.99 mi (7,786.00 km) |
| Merthyr Tudful to Schiller Park (Illinois) | 3,821.20 mi (6,149.63 km) |
| Merthyr Tudful to Schofield Barracks (Hawaii) | 7,149.71 mi (11,506.34 km) |
| Merthyr Tudful to Scotchtown (New York) | 3,305.46 mi (5,319.62 km) |
| Merthyr Tudful to Scottdale (Georgia) | 4,061.51 mi (6,536.36 km) |
| Merthyr Tudful to Scotts Valley (California) | 5,273.69 mi (8,487.19 km) |
| Merthyr Tudful to Scottsbluff (Nebraska) | 4,406.98 mi (7,092.35 km) |
