| Villa Castelli to Olympia Heights (Florida) | 5,464.67 mi (8,794.54 km) |
| Villa Castelli to Omaha (Nebraska) | 5,416.91 mi (8,717.68 km) |
| Villa Castelli to On Top of the World Designated Place (Florida) | 5,405.73 mi (8,699.69 km) |
| Villa Castelli to Onalaska (Wisconsin) | 5,113.06 mi (8,228.68 km) |
| Villa Castelli to Oneida (New York) | 4,529.17 mi (7,289.00 km) |
| Villa Castelli to Oneonta (New York) | 4,527.75 mi (7,286.71 km) |
| Villa Castelli to Ontario (California) | 6,541.57 mi (10,527.65 km) |
| Villa Castelli to Ontario (Oregon) | 5,942.43 mi (9,563.42 km) |
| Villa Castelli to Opa-locka (Florida) | 5,452.89 mi (8,775.57 km) |
| Villa Castelli to Opelika (Alabama) | 5,385.77 mi (8,667.57 km) |
| Villa Castelli to Opelousas (Louisiana) | 5,776.67 mi (9,296.65 km) |
| Villa Castelli to Orange (California) | 6,561.93 mi (10,560.41 km) |
| Villa Castelli to Orange (Texas) | 5,867.75 mi (9,443.22 km) |
| Villa Castelli to Orange City (Florida) | 5,367.09 mi (8,637.49 km) |
| Villa Castelli to Orangeburg (South Carolina) | 5,148.37 mi (8,285.49 km) |
