| Harrow to Parczew | 991.85 mi (1,596.24 km) |
| Harrow to Paslek | 849.85 mi (1,367.71 km) |
| Harrow to Piaseczno | 909.61 mi (1,463.87 km) |
| Harrow to Piastow | 901.72 mi (1,451.18 km) |
| Harrow to Piekary Slaskie | 840.95 mi (1,353.38 km) |
| Harrow to Pila | 726.86 mi (1,169.77 km) |
| Harrow to Pinczow | 906.53 mi (1,458.92 km) |
| Harrow to Pionki | 933.36 mi (1,502.09 km) |
| Harrow to Piotrkow Trybunalski | 859.06 mi (1,382.52 km) |
| Harrow to Pisz | 936.01 mi (1,506.37 km) |
| Harrow to Pleszew | 774.06 mi (1,245.72 km) |
| Harrow to Plewiska | 730.44 mi (1,175.52 km) |
| Harrow to Plock | 851.31 mi (1,370.06 km) |
| Harrow to Plonsk | 879.59 mi (1,415.56 km) |
| Harrow to Pobiedziska | 758.47 mi (1,220.65 km) |
