| Portet-sur-Garonne to Oria | 857.29 mi (1,379.68 km) |
| Portet-sur-Garonne to Oristano | 446.70 mi (718.89 km) |
| Portet-sur-Garonne to Orta Nova | 744.12 mi (1,197.55 km) |
| Portet-sur-Garonne to Orte | 559.32 mi (900.15 km) |
| Portet-sur-Garonne to Ortona | 661.56 mi (1,064.69 km) |
| Portet-sur-Garonne to Orvieto | 542.31 mi (872.76 km) |
| Portet-sur-Garonne to Orzinuovi | 439.82 mi (707.83 km) |
| Portet-sur-Garonne to Osimo | 604.74 mi (973.23 km) |
| Portet-sur-Garonne to Ospitaletto | 449.10 mi (722.75 km) |
| Portet-sur-Garonne to Ostuni | 849.58 mi (1,367.27 km) |
| Portet-sur-Garonne to Ottaviano | 693.37 mi (1,115.86 km) |
| Portet-sur-Garonne to Ovada | 367.43 mi (591.32 km) |
| Portet-sur-Garonne to Ozieri | 439.18 mi (706.79 km) |
| Portet-sur-Garonne to Paceco | 696.67 mi (1,121.18 km) |
| Portet-sur-Garonne to Pachino | 861.17 mi (1,385.92 km) |
