| Greenock to Pontedera | 1,086.79 mi (1,749.03 km) |
| Greenock to Pontinia | 1,284.23 mi (2,066.77 km) |
| Greenock to Porcari | 1,076.02 mi (1,731.68 km) |
| Greenock to Porcia | 1,018.49 mi (1,639.11 km) |
| Greenock to Pordenone | 1,020.42 mi (1,642.20 km) |
| Greenock to Portici | 1,354.99 mi (2,180.64 km) |
| Greenock to Porto Empedocle | 1,543.49 mi (2,484.00 km) |
| Greenock to Porto Recanati | 1,187.11 mi (1,910.47 km) |
| Greenock to Porto Sant'Elpidio | 1,198.84 mi (1,929.35 km) |
| Greenock to Porto Tolle | 1,063.27 mi (1,711.17 km) |
| Greenock to Porto Torres | 1,201.73 mi (1,934.01 km) |
| Greenock to Portoferraio | 1,127.74 mi (1,814.93 km) |
| Greenock to Portogruaro | 1,034.89 mi (1,665.50 km) |
| Greenock to Portomaggiore | 1,061.47 mi (1,708.27 km) |
| Greenock to Potenza | 1,408.14 mi (2,266.18 km) |
