| Merthyr Tudful to Pittsburg (Kansas) | 4,300.48 mi (6,920.96 km) |
| Merthyr Tudful to Pittsburgh (Pennsylvania) | 3,578.21 mi (5,758.57 km) |
| Merthyr Tudful to Pittsfield (Massachusetts) | 3,219.40 mi (5,181.13 km) |
| Merthyr Tudful to Placentia (California) | 5,320.97 mi (8,563.28 km) |
| Merthyr Tudful to Placerville (California) | 5,140.80 mi (8,273.31 km) |
| Merthyr Tudful to Plainfield (Illinois) | 3,850.41 mi (6,196.64 km) |
| Merthyr Tudful to Plainfield (Indiana) | 3,867.02 mi (6,223.37 km) |
| Merthyr Tudful to Plainfield (New Jersey) | 3,344.21 mi (5,381.99 km) |
| Merthyr Tudful to Plainview (New York) | 3,298.28 mi (5,308.07 km) |
| Merthyr Tudful to Plainview (Texas) | 4,731.06 mi (7,613.90 km) |
| Merthyr Tudful to Plano (Illinois) | 3,859.59 mi (6,211.41 km) |
| Merthyr Tudful to Plano (Texas) | 4,599.08 mi (7,401.50 km) |
| Merthyr Tudful to Plant City (Florida) | 4,256.54 mi (6,850.25 km) |
| Merthyr Tudful to Plantation (Florida) | 4,272.74 mi (6,876.31 km) |
| Merthyr Tudful to Platteville (Wisconsin) | 3,884.97 mi (6,252.25 km) |
