| Merthyr Tudful to Spout Springs (North Carolina) | 3,775.34 mi (6,075.82 km) |
| Merthyr Tudful to Spring (Texas) | 4,698.38 mi (7,561.31 km) |
| Merthyr Tudful to Spring Creek (Nevada) | 4,865.57 mi (7,830.37 km) |
| Merthyr Tudful to Spring Hill (Florida) | 4,250.52 mi (6,840.56 km) |
| Merthyr Tudful to Spring Hill (Tennessee) | 4,075.27 mi (6,558.51 km) |
| Merthyr Tudful to Spring Lake (North Carolina) | 3,777.94 mi (6,080.00 km) |
| Merthyr Tudful to Spring Valley (California) | 5,356.24 mi (8,620.04 km) |
| Merthyr Tudful to Spring Valley (Nevada) | 5,110.97 mi (8,225.31 km) |
| Merthyr Tudful to Spring Valley (New York) | 3,307.78 mi (5,323.36 km) |
| Merthyr Tudful to Springboro (Ohio) | 3,788.51 mi (6,097.02 km) |
| Merthyr Tudful to Springdale (Arkansas) | 4,340.11 mi (6,984.74 km) |
| Merthyr Tudful to Springdale (New Jersey) | 3,399.06 mi (5,470.25 km) |
| Merthyr Tudful to Springdale (Ohio) | 3,810.56 mi (6,132.50 km) |
| Merthyr Tudful to Springfield (Illinois) | 3,991.87 mi (6,424.29 km) |
| Merthyr Tudful to Springfield (Massachusetts) | 3,203.86 mi (5,156.12 km) |
