| Upper Grand Lagoon to Pontedera | 5,105.07 mi (8,215.82 km) |
| Upper Grand Lagoon to Pontinia | 5,285.96 mi (8,506.93 km) |
| Upper Grand Lagoon to Porcari | 5,098.81 mi (8,205.74 km) |
| Upper Grand Lagoon to Porcia | 5,119.81 mi (8,239.54 km) |
| Upper Grand Lagoon to Pordenone | 5,121.76 mi (8,242.68 km) |
| Upper Grand Lagoon to Portici | 5,364.71 mi (8,633.67 km) |
| Upper Grand Lagoon to Porto Empedocle | 5,446.57 mi (8,765.40 km) |
| Upper Grand Lagoon to Porto Recanati | 5,247.08 mi (8,444.36 km) |
| Upper Grand Lagoon to Porto Sant'Elpidio | 5,256.30 mi (8,459.20 km) |
| Upper Grand Lagoon to Porto Tolle | 5,139.03 mi (8,270.48 km) |
| Upper Grand Lagoon to Porto Torres | 5,089.24 mi (8,190.35 km) |
| Upper Grand Lagoon to Portoferraio | 5,117.01 mi (8,235.03 km) |
| Upper Grand Lagoon to Portogruaro | 5,134.88 mi (8,263.79 km) |
| Upper Grand Lagoon to Portomaggiore | 5,124.38 mi (8,246.90 km) |
| Upper Grand Lagoon to Potenza | 5,437.39 mi (8,750.64 km) |
