| Casale Monferrato to Oswego (Illinois) | 4,550.36 mi (7,323.10 km) |
| Casale Monferrato to Oswego (New York) | 3,995.61 mi (6,430.31 km) |
| Casale Monferrato to Otsego (Minnesota) | 4,591.04 mi (7,388.57 km) |
| Casale Monferrato to Ottawa (Illinois) | 4,584.30 mi (7,377.72 km) |
| Casale Monferrato to Ottawa (Kansas) | 4,964.80 mi (7,990.08 km) |
| Casale Monferrato to Ottumwa (Iowa) | 4,740.40 mi (7,628.94 km) |
| Casale Monferrato to Overland (Missouri) | 4,766.35 mi (7,670.69 km) |
| Casale Monferrato to Overland Park (Kansas) | 4,928.62 mi (7,931.84 km) |
| Casale Monferrato to Overlea (Maryland) | 4,157.95 mi (6,691.58 km) |
| Casale Monferrato to Oviedo (Florida) | 4,829.29 mi (7,771.99 km) |
| Casale Monferrato to Owasso (Oklahoma) | 5,098.53 mi (8,205.30 km) |
| Casale Monferrato to Owatonna (Minnesota) | 4,630.24 mi (7,451.65 km) |
| Casale Monferrato to Owensboro (Kentucky) | 4,676.14 mi (7,525.52 km) |
| Casale Monferrato to Owings Mills (Maryland) | 4,167.87 mi (6,707.54 km) |
| Casale Monferrato to Owosso (Michigan) | 4,327.83 mi (6,964.97 km) |
