| Merthyr Tudful to Piedras Blancas | 578.08 mi (930.32 km) |
| Merthyr Tudful to Piera | 746.44 mi (1,201.28 km) |
| Merthyr Tudful to Pilar de la Horadada | 967.00 mi (1,556.23 km) |
| Merthyr Tudful to Pilas | 1,007.90 mi (1,622.06 km) |
| Merthyr Tudful to Pinos Puente | 1,001.53 mi (1,611.81 km) |
| Merthyr Tudful to Pinto | 794.24 mi (1,278.20 km) |
| Merthyr Tudful to Pizarra | 1,036.78 mi (1,668.54 km) |
| Merthyr Tudful to Plasencia | 819.76 mi (1,319.27 km) |
| Merthyr Tudful to Pola de Laviana | 596.45 mi (959.89 km) |
| Merthyr Tudful to Pola de Lena | 604.01 mi (972.06 km) |
| Merthyr Tudful to Pola de Siero | 587.15 mi (944.93 km) |
| Merthyr Tudful to Pollensa | 874.94 mi (1,408.08 km) |
| Merthyr Tudful to Ponferrada | 652.96 mi (1,050.84 km) |
| Merthyr Tudful to Pontevedra | 688.66 mi (1,108.29 km) |
| Merthyr Tudful to Portugalete | 582.25 mi (937.05 km) |
