| Harrow to Palencia | 689.74 mi (1,110.02 km) |
| Harrow to Palleja | 710.64 mi (1,143.67 km) |
| Harrow to Palma | 842.65 mi (1,356.11 km) |
| Harrow to Palma del Rio | 988.91 mi (1,591.49 km) |
| Harrow to Palomares del Rio | 1,024.31 mi (1,648.47 km) |
| Harrow to Palos de la Frontera | 1,042.14 mi (1,677.16 km) |
| Harrow to Pamplona | 608.79 mi (979.75 km) |
| Harrow to Paracuellos de Jarama | 777.15 mi (1,250.71 km) |
| Harrow to Parla | 800.86 mi (1,288.85 km) |
| Harrow to Paterna | 834.71 mi (1,343.34 km) |
| Harrow to Peligros | 1,004.43 mi (1,616.47 km) |
| Harrow to Penarroya-Pueblonuevo | 948.27 mi (1,526.10 km) |
| Harrow to Petrel | 905.71 mi (1,457.60 km) |
| Harrow to Picana | 839.32 mi (1,350.76 km) |
| Harrow to Picasent | 844.51 mi (1,359.11 km) |
