| Merthyr Tudful to Oxford (Alabama) | 4,136.86 mi (6,657.63 km) |
| Merthyr Tudful to Oxford (Mississippi) | 4,247.78 mi (6,836.14 km) |
| Merthyr Tudful to Oxford (Ohio) | 3,811.35 mi (6,133.77 km) |
| Merthyr Tudful to Oxnard (California) | 5,346.77 mi (8,604.80 km) |
| Merthyr Tudful to Oxon Hill (Maryland) | 3,529.35 mi (5,679.94 km) |
| Merthyr Tudful to Ozark (Alabama) | 4,232.96 mi (6,812.30 km) |
| Merthyr Tudful to Ozark (Missouri) | 4,261.80 mi (6,858.70 km) |
| Merthyr Tudful to Pace (Florida) | 4,336.85 mi (6,979.48 km) |
| Merthyr Tudful to Pacific Grove (California) | 5,296.05 mi (8,523.18 km) |
| Merthyr Tudful to Pacifica (California) | 5,256.14 mi (8,458.95 km) |
| Merthyr Tudful to Paducah (Kentucky) | 4,080.74 mi (6,567.31 km) |
| Merthyr Tudful to Pahrump (Nevada) | 5,128.24 mi (8,253.10 km) |
| Merthyr Tudful to Painesville (Ohio) | 3,572.64 mi (5,749.61 km) |
| Merthyr Tudful to Palatine (Illinois) | 3,820.60 mi (6,148.66 km) |
| Merthyr Tudful to Palatka (Florida) | 4,156.36 mi (6,689.02 km) |
