| Altavilla Vicentina to Olympia Heights (Florida) | 5,053.79 mi (8,133.29 km) |
| Altavilla Vicentina to Omaha (Nebraska) | 4,961.79 mi (7,985.23 km) |
| Altavilla Vicentina to On Top of the World Designated Place (Florida) | 4,982.51 mi (8,018.58 km) |
| Altavilla Vicentina to Onalaska (Wisconsin) | 4,658.36 mi (7,496.91 km) |
| Altavilla Vicentina to Oneida (New York) | 4,085.63 mi (6,575.19 km) |
| Altavilla Vicentina to Oneonta (New York) | 4,085.90 mi (6,575.62 km) |
| Altavilla Vicentina to Ontario (California) | 6,085.70 mi (9,793.99 km) |
| Altavilla Vicentina to Ontario (Oregon) | 5,491.00 mi (8,836.91 km) |
| Altavilla Vicentina to Opa-locka (Florida) | 5,041.71 mi (8,113.85 km) |
| Altavilla Vicentina to Opelika (Alabama) | 4,950.17 mi (7,966.53 km) |
| Altavilla Vicentina to Opelousas (Louisiana) | 5,335.63 mi (8,586.87 km) |
| Altavilla Vicentina to Orange (California) | 6,106.07 mi (9,826.78 km) |
| Altavilla Vicentina to Orange (Texas) | 5,425.18 mi (8,730.98 km) |
| Altavilla Vicentina to Orange City (Florida) | 4,946.10 mi (7,959.97 km) |
| Altavilla Vicentina to Orangeburg (South Carolina) | 4,717.64 mi (7,592.32 km) |
