| Merthyr Tudful to Point Pleasant (New Jersey) | 3,353.20 mi (5,396.45 km) |
| Merthyr Tudful to Pomona (California) | 5,307.88 mi (8,542.21 km) |
| Merthyr Tudful to Pompano Beach (Florida) | 4,261.32 mi (6,857.92 km) |
| Merthyr Tudful to Pompton Lakes (New Jersey) | 3,322.31 mi (5,346.75 km) |
| Merthyr Tudful to Pompton Plains (New Jersey) | 3,324.67 mi (5,350.54 km) |
| Merthyr Tudful to Ponca City (Oklahoma) | 4,425.37 mi (7,121.94 km) |
| Merthyr Tudful to Ponce (Puerto Rico) | 4,109.31 mi (6,613.29 km) |
| Merthyr Tudful to Pontiac (Illinois) | 3,900.26 mi (6,276.86 km) |
| Merthyr Tudful to Pontiac (Michigan) | 3,612.23 mi (5,813.32 km) |
| Merthyr Tudful to Pooler (Georgia) | 4,018.88 mi (6,467.76 km) |
| Merthyr Tudful to Poplar Bluff (Missouri) | 4,165.55 mi (6,703.81 km) |
| Merthyr Tudful to Poquoson (Virginia) | 3,578.50 mi (5,759.03 km) |
| Merthyr Tudful to Port Angeles (Washington) | 4,686.40 mi (7,542.04 km) |
| Merthyr Tudful to Port Arthur (Texas) | 4,650.59 mi (7,484.40 km) |
| Merthyr Tudful to Port Charlotte (Florida) | 4,307.54 mi (6,932.32 km) |
