| Pianoro to Odessa (Texas) | 5,719.48 mi (9,204.62 km) |
| Pianoro to Ogden (Utah) | 5,558.73 mi (8,945.90 km) |
| Pianoro to Oildale (California) | 6,106.25 mi (9,827.06 km) |
| Pianoro to Ojus (Florida) | 5,056.15 mi (8,137.09 km) |
| Pianoro to Okemos (Michigan) | 4,494.61 mi (7,233.38 km) |
| Pianoro to Oklahoma City (Oklahoma) | 5,349.12 mi (8,608.58 km) |
| Pianoro to Okmulgee (Oklahoma) | 5,282.82 mi (8,501.88 km) |
| Pianoro to Olathe (Kansas) | 5,077.18 mi (8,170.94 km) |
| Pianoro to Old Jamestown (Missouri) | 4,901.51 mi (7,888.21 km) |
| Pianoro to Oldsmar (Florida) | 5,074.75 mi (8,167.03 km) |
| Pianoro to Olean (New York) | 4,277.19 mi (6,883.48 km) |
| Pianoro to Olive Branch (Mississippi) | 5,065.06 mi (8,151.42 km) |
| Pianoro to Olivehurst (California) | 5,967.43 mi (9,603.64 km) |
| Pianoro to Olney (Maryland) | 4,339.50 mi (6,983.75 km) |
| Pianoro to Olympia (Washington) | 5,533.37 mi (8,905.09 km) |
