| Castelnuovo Rangone to Oswego (Illinois) | 4,671.91 mi (7,518.71 km) |
| Castelnuovo Rangone to Oswego (New York) | 4,119.79 mi (6,630.16 km) |
| Castelnuovo Rangone to Otsego (Minnesota) | 4,708.10 mi (7,576.96 km) |
| Castelnuovo Rangone to Ottawa (Illinois) | 4,705.86 mi (7,573.34 km) |
| Castelnuovo Rangone to Ottawa (Kansas) | 5,085.38 mi (8,184.13 km) |
| Castelnuovo Rangone to Ottumwa (Iowa) | 4,860.77 mi (7,822.65 km) |
| Castelnuovo Rangone to Overland (Missouri) | 4,888.77 mi (7,867.72 km) |
| Castelnuovo Rangone to Overland Park (Kansas) | 5,049.28 mi (8,126.03 km) |
| Castelnuovo Rangone to Overlea (Maryland) | 4,283.88 mi (6,894.24 km) |
| Castelnuovo Rangone to Oviedo (Florida) | 4,956.87 mi (7,977.31 km) |
| Castelnuovo Rangone to Owasso (Oklahoma) | 5,220.10 mi (8,400.94 km) |
| Castelnuovo Rangone to Owatonna (Minnesota) | 4,748.30 mi (7,641.65 km) |
| Castelnuovo Rangone to Owensboro (Kentucky) | 4,800.08 mi (7,724.98 km) |
| Castelnuovo Rangone to Owings Mills (Maryland) | 4,293.73 mi (6,910.09 km) |
| Castelnuovo Rangone to Owosso (Michigan) | 4,450.05 mi (7,161.67 km) |
