| Prato to Oswego (Illinois) | 4,706.36 mi (7,574.15 km) |
| Prato to Oswego (New York) | 4,151.75 mi (6,681.60 km) |
| Prato to Otsego (Minnesota) | 4,745.51 mi (7,637.16 km) |
| Prato to Ottawa (Illinois) | 4,740.30 mi (7,628.77 km) |
| Prato to Ottawa (Kansas) | 5,120.57 mi (8,240.77 km) |
| Prato to Ottumwa (Iowa) | 4,896.11 mi (7,879.53 km) |
| Prato to Overland (Missouri) | 4,922.48 mi (7,921.97 km) |
| Prato to Overland Park (Kansas) | 5,084.41 mi (8,182.57 km) |
| Prato to Overlea (Maryland) | 4,313.49 mi (6,941.89 km) |
| Prato to Oviedo (Florida) | 4,982.19 mi (8,018.06 km) |
| Prato to Owasso (Oklahoma) | 5,254.54 mi (8,456.36 km) |
| Prato to Owatonna (Minnesota) | 4,785.14 mi (7,700.94 km) |
| Prato to Owensboro (Kentucky) | 4,832.31 mi (7,776.85 km) |
| Prato to Owings Mills (Maryland) | 4,323.45 mi (6,957.92 km) |
| Prato to Owosso (Michigan) | 4,483.94 mi (7,216.20 km) |
