| Volterra to Olympia Heights (Florida) | 5,076.56 mi (8,169.94 km) |
| Volterra to Omaha (Nebraska) | 5,036.27 mi (8,105.09 km) |
| Volterra to On Top of the World Designated Place (Florida) | 5,015.12 mi (8,071.05 km) |
| Volterra to Onalaska (Wisconsin) | 4,731.65 mi (7,614.85 km) |
| Volterra to Oneida (New York) | 4,139.20 mi (6,661.40 km) |
| Volterra to Oneonta (New York) | 4,137.32 mi (6,658.38 km) |
| Volterra to Ontario (California) | 6,178.72 mi (9,943.68 km) |
| Volterra to Ontario (Oregon) | 5,594.26 mi (9,003.09 km) |
| Volterra to Opa-locka (Florida) | 5,064.70 mi (8,150.85 km) |
| Volterra to Opelika (Alabama) | 4,994.43 mi (8,037.77 km) |
| Volterra to Opelousas (Louisiana) | 5,385.91 mi (8,667.79 km) |
| Volterra to Orange (California) | 6,199.12 mi (9,976.52 km) |
| Volterra to Orange (Texas) | 5,477.31 mi (8,814.87 km) |
| Volterra to Orange City (Florida) | 4,976.81 mi (8,009.40 km) |
| Volterra to Orangeburg (South Carolina) | 4,757.02 mi (7,655.68 km) |
