| Castelnuovo Rangone to Odessa (Texas) | 5,696.86 mi (9,168.22 km) |
| Castelnuovo Rangone to Ogden (Utah) | 5,537.26 mi (8,911.36 km) |
| Castelnuovo Rangone to Oildale (California) | 6,084.95 mi (9,792.78 km) |
| Castelnuovo Rangone to Ojus (Florida) | 5,033.68 mi (8,100.93 km) |
| Castelnuovo Rangone to Okemos (Michigan) | 4,471.89 mi (7,196.81 km) |
| Castelnuovo Rangone to Oklahoma City (Oklahoma) | 5,326.47 mi (8,572.13 km) |
| Castelnuovo Rangone to Okmulgee (Oklahoma) | 5,260.13 mi (8,465.37 km) |
| Castelnuovo Rangone to Olathe (Kansas) | 5,054.59 mi (8,134.57 km) |
| Castelnuovo Rangone to Old Jamestown (Missouri) | 4,878.78 mi (7,851.64 km) |
| Castelnuovo Rangone to Oldsmar (Florida) | 5,052.09 mi (8,130.55 km) |
| Castelnuovo Rangone to Olean (New York) | 4,254.37 mi (6,846.75 km) |
| Castelnuovo Rangone to Olive Branch (Mississippi) | 5,042.24 mi (8,114.70 km) |
| Castelnuovo Rangone to Olivehurst (California) | 5,946.70 mi (9,570.29 km) |
| Castelnuovo Rangone to Olney (Maryland) | 4,316.66 mi (6,947.00 km) |
| Castelnuovo Rangone to Olympia (Washington) | 5,513.56 mi (8,873.22 km) |
