| Pornichet to Oria | 1,094.85 mi (1,762.00 km) |
| Pornichet to Oristano | 745.62 mi (1,199.96 km) |
| Pornichet to Orta Nova | 979.30 mi (1,576.03 km) |
| Pornichet to Orte | 792.28 mi (1,275.05 km) |
| Pornichet to Ortona | 885.84 mi (1,425.62 km) |
| Pornichet to Orvieto | 771.30 mi (1,241.30 km) |
| Pornichet to Orzinuovi | 598.86 mi (963.77 km) |
| Pornichet to Osimo | 809.53 mi (1,302.82 km) |
| Pornichet to Ospitaletto | 602.36 mi (969.41 km) |
| Pornichet to Ostuni | 1,084.18 mi (1,744.82 km) |
| Pornichet to Ottaviano | 942.65 mi (1,517.05 km) |
| Pornichet to Ovada | 557.51 mi (897.23 km) |
| Pornichet to Ozieri | 727.91 mi (1,171.46 km) |
| Pornichet to Paceco | 989.17 mi (1,591.92 km) |
| Pornichet to Pachino | 1,150.13 mi (1,850.95 km) |
