| Gragnano to Octeville | 996.68 mi (1,604.00 km) |
| Gragnano to Oignies | 873.38 mi (1,405.57 km) |
| Gragnano to Oissel | 884.58 mi (1,423.59 km) |
| Gragnano to Olivet | 794.96 mi (1,279.36 km) |
| Gragnano to Ollioules | 476.30 mi (766.53 km) |
| Gragnano to Olonne-sur-Mer | 906.87 mi (1,459.47 km) |
| Gragnano to Oloron-Sainte-Marie | 794.89 mi (1,279.24 km) |
| Gragnano to Onet Village | 657.04 mi (1,057.41 km) |
| Gragnano to Onnaing | 851.11 mi (1,369.72 km) |
| Gragnano to Orange | 548.77 mi (883.16 km) |
| Gragnano to Orchies | 866.08 mi (1,393.82 km) |
| Gragnano to Orleans | 796.13 mi (1,281.24 km) |
| Gragnano to Orly | 812.70 mi (1,307.91 km) |
| Gragnano to Ormesson-sur-Marne | 809.36 mi (1,302.54 km) |
| Gragnano to Orsay | 818.08 mi (1,316.58 km) |
