| Castelnuovo Rangone to Oakley (California) | 6,014.49 mi (9,679.39 km) |
| Castelnuovo Rangone to Oakton (Virginia) | 4,337.21 mi (6,980.06 km) |
| Castelnuovo Rangone to Oakville (Missouri) | 4,898.37 mi (7,883.17 km) |
| Castelnuovo Rangone to Oatfield (Oregon) | 5,601.99 mi (9,015.53 km) |
| Castelnuovo Rangone to Ocala (Florida) | 4,976.73 mi (8,009.27 km) |
| Castelnuovo Rangone to Ocean Acres (New Jersey) | 4,171.87 mi (6,713.98 km) |
| Castelnuovo Rangone to Ocean City (New Jersey) | 4,204.85 mi (6,767.05 km) |
| Castelnuovo Rangone to Ocean Pines (Maryland) | 4,264.44 mi (6,862.95 km) |
| Castelnuovo Rangone to Ocean Pointe (Hawaii) | 7,832.88 mi (12,605.80 km) |
| Castelnuovo Rangone to Ocean Springs (Mississippi) | 5,212.68 mi (8,389.00 km) |
| Castelnuovo Rangone to Oceanside (California) | 6,157.48 mi (9,909.51 km) |
| Castelnuovo Rangone to Oceanside (New York) | 4,108.82 mi (6,612.51 km) |
| Castelnuovo Rangone to Ocoee (Florida) | 4,976.18 mi (8,008.38 km) |
| Castelnuovo Rangone to Oconomowoc (Wisconsin) | 4,614.77 mi (7,426.75 km) |
| Castelnuovo Rangone to Odenton (Maryland) | 4,303.69 mi (6,926.13 km) |
