| Potenza Picena to Olympia Heights (Florida) | 5,206.40 mi (8,378.89 km) |
| Potenza Picena to Omaha (Nebraska) | 5,140.51 mi (8,272.85 km) |
| Potenza Picena to On Top of the World Designated Place (Florida) | 5,141.52 mi (8,274.47 km) |
| Potenza Picena to Onalaska (Wisconsin) | 4,836.68 mi (7,783.88 km) |
| Potenza Picena to Oneida (New York) | 4,255.98 mi (6,849.34 km) |
| Potenza Picena to Oneonta (New York) | 4,255.21 mi (6,848.10 km) |
| Potenza Picena to Ontario (California) | 6,268.34 mi (10,087.92 km) |
| Potenza Picena to Ontario (Oregon) | 5,673.92 mi (9,131.30 km) |
| Potenza Picena to Opa-locka (Florida) | 5,194.47 mi (8,359.69 km) |
| Potenza Picena to Opelika (Alabama) | 5,115.95 mi (8,233.32 km) |
| Potenza Picena to Opelousas (Louisiana) | 5,504.61 mi (8,858.81 km) |
| Potenza Picena to Orange (California) | 6,288.71 mi (10,120.71 km) |
| Potenza Picena to Orange (Texas) | 5,595.07 mi (9,004.40 km) |
| Potenza Picena to Orange City (Florida) | 5,103.91 mi (8,213.95 km) |
| Potenza Picena to Orangeburg (South Carolina) | 4,880.64 mi (7,854.64 km) |
