| Southborough to Piedras Blancas | 600.37 mi (966.19 km) |
| Southborough to Piera | 669.61 mi (1,077.63 km) |
| Southborough to Pilar de la Horadada | 919.89 mi (1,480.42 km) |
| Southborough to Pilas | 1,010.13 mi (1,625.65 km) |
| Southborough to Pinos Puente | 981.05 mi (1,578.85 km) |
| Southborough to Pinto | 777.40 mi (1,251.10 km) |
| Southborough to Pizarra | 1,024.06 mi (1,648.07 km) |
| Southborough to Plasencia | 827.51 mi (1,331.75 km) |
| Southborough to Pola de Laviana | 611.45 mi (984.04 km) |
| Southborough to Pola de Lena | 622.08 mi (1,001.14 km) |
| Southborough to Pola de Siero | 604.18 mi (972.33 km) |
| Southborough to Pollensa | 790.70 mi (1,272.51 km) |
| Southborough to Ponferrada | 676.91 mi (1,089.38 km) |
| Southborough to Pontevedra | 734.17 mi (1,181.53 km) |
| Southborough to Portugalete | 563.05 mi (906.15 km) |
