| Merthyr Tudful to Poyo | 689.22 mi (1,109.19 km) |
| Merthyr Tudful to Pozoblanco | 925.81 mi (1,489.94 km) |
| Merthyr Tudful to Premia de Mar | 758.26 mi (1,220.31 km) |
| Merthyr Tudful to Priego de Cordoba | 989.48 mi (1,592.42 km) |
| Merthyr Tudful to Puente-Genil | 994.46 mi (1,600.43 km) |
| Merthyr Tudful to Puenteareas | 703.93 mi (1,132.87 km) |
| Merthyr Tudful to Puerto de la Cruz | 1,749.41 mi (2,815.40 km) |
| Merthyr Tudful to Puerto del Rosario | 1,694.83 mi (2,727.56 km) |
| Merthyr Tudful to Puerto Real | 1,060.18 mi (1,706.20 km) |
| Merthyr Tudful to Puertollano | 903.04 mi (1,453.30 km) |
| Merthyr Tudful to Puigcerda | 689.62 mi (1,109.84 km) |
| Merthyr Tudful to Pulpi | 994.04 mi (1,599.75 km) |
| Merthyr Tudful to Puzol | 850.71 mi (1,369.08 km) |
| Merthyr Tudful to Quintanar de la Orden | 839.80 mi (1,351.53 km) |
| Merthyr Tudful to Rafelbunol | 852.11 mi (1,371.33 km) |
