| Pietrasanta to Olympia Heights (Florida) | 5,033.33 mi (8,100.37 km) |
| Pietrasanta to Omaha (Nebraska) | 4,987.10 mi (8,025.97 km) |
| Pietrasanta to On Top of the World Designated Place (Florida) | 4,970.34 mi (7,998.98 km) |
| Pietrasanta to Onalaska (Wisconsin) | 4,682.54 mi (7,535.83 km) |
| Pietrasanta to Oneida (New York) | 4,091.68 mi (6,584.93 km) |
| Pietrasanta to Oneonta (New York) | 4,090.04 mi (6,582.28 km) |
| Pietrasanta to Ontario (California) | 6,129.03 mi (9,863.72 km) |
| Pietrasanta to Ontario (Oregon) | 5,544.79 mi (8,923.47 km) |
| Pietrasanta to Opa-locka (Florida) | 5,021.43 mi (8,081.22 km) |
| Pietrasanta to Opelika (Alabama) | 4,948.06 mi (7,963.13 km) |
| Pietrasanta to Opelousas (Louisiana) | 5,338.84 mi (8,592.04 km) |
| Pietrasanta to Orange (California) | 6,149.43 mi (9,896.56 km) |
| Pietrasanta to Orange (Texas) | 5,430.04 mi (8,738.80 km) |
| Pietrasanta to Orange City (Florida) | 4,932.31 mi (7,937.79 km) |
| Pietrasanta to Orangeburg (South Carolina) | 4,711.25 mi (7,582.03 km) |
