| Treviso to Octeville | 700.35 mi (1,127.10 km) |
| Treviso to Oignies | 539.87 mi (868.84 km) |
| Treviso to Oissel | 578.15 mi (930.44 km) |
| Treviso to Olivet | 511.85 mi (823.75 km) |
| Treviso to Ollioules | 360.78 mi (580.62 km) |
| Treviso to Olonne-sur-Mer | 673.15 mi (1,083.34 km) |
| Treviso to Oloron-Sainte-Marie | 655.83 mi (1,055.45 km) |
| Treviso to Onet Village | 479.50 mi (771.67 km) |
| Treviso to Onnaing | 514.87 mi (828.60 km) |
| Treviso to Orange | 378.69 mi (609.44 km) |
| Treviso to Orchies | 531.03 mi (854.61 km) |
| Treviso to Orleans | 512.10 mi (824.14 km) |
| Treviso to Orly | 508.19 mi (817.85 km) |
| Treviso to Ormesson-sur-Marne | 503.07 mi (809.61 km) |
| Treviso to Orsay | 515.84 mi (830.17 km) |
