| Merthyr Tudful to Parma Heights (Ohio) | 3,607.83 mi (5,806.23 km) |
| Merthyr Tudful to Parole (Maryland) | 3,503.23 mi (5,637.90 km) |
| Merthyr Tudful to Parsippany (New Jersey) | 3,333.44 mi (5,364.65 km) |
| Merthyr Tudful to Pasadena (California) | 5,314.63 mi (8,553.07 km) |
| Merthyr Tudful to Pasadena (Maryland) | 3,495.81 mi (5,625.96 km) |
| Merthyr Tudful to Pasadena (Texas) | 4,709.84 mi (7,579.76 km) |
| Merthyr Tudful to Pasadena Hills (Florida) | 4,247.81 mi (6,836.20 km) |
| Merthyr Tudful to Pascagoula (Mississippi) | 4,406.31 mi (7,091.28 km) |
| Merthyr Tudful to Pasco (Washington) | 4,670.15 mi (7,515.88 km) |
| Merthyr Tudful to Passaic (New Jersey) | 3,322.04 mi (5,346.30 km) |
| Merthyr Tudful to Pataskala (Ohio) | 3,707.40 mi (5,966.48 km) |
| Merthyr Tudful to Patchogue (New York) | 3,280.45 mi (5,279.38 km) |
| Merthyr Tudful to Paterson (New Jersey) | 3,320.99 mi (5,344.62 km) |
| Merthyr Tudful to Patterson (California) | 5,223.14 mi (8,405.83 km) |
| Merthyr Tudful to Pawtucket (Rhode Island) | 3,165.99 mi (5,095.17 km) |
