| Poggiomarino to Olympia Heights (Florida) | 5,318.00 mi (8,558.49 km) |
| Poggiomarino to Omaha (Nebraska) | 5,296.79 mi (8,524.37 km) |
| Poggiomarino to On Top of the World Designated Place (Florida) | 5,262.57 mi (8,469.29 km) |
| Poggiomarino to Onalaska (Wisconsin) | 4,992.13 mi (8,034.06 km) |
| Poggiomarino to Oneida (New York) | 4,396.15 mi (7,074.92 km) |
| Poggiomarino to Oneonta (New York) | 4,393.59 mi (7,070.79 km) |
| Poggiomarino to Ontario (California) | 6,437.22 mi (10,359.71 km) |
| Poggiomarino to Ontario (Oregon) | 5,848.63 mi (9,412.47 km) |
| Poggiomarino to Opa-locka (Florida) | 5,306.29 mi (8,539.64 km) |
| Poggiomarino to Opelika (Alabama) | 5,247.64 mi (8,445.26 km) |
| Poggiomarino to Opelousas (Louisiana) | 5,641.36 mi (9,078.89 km) |
| Poggiomarino to Orange (California) | 6,457.62 mi (10,392.54 km) |
| Poggiomarino to Orange (Texas) | 5,733.37 mi (9,226.97 km) |
| Poggiomarino to Orange City (Florida) | 5,223.22 mi (8,405.97 km) |
| Poggiomarino to Orangeburg (South Carolina) | 5,008.12 mi (8,059.80 km) |
