| Certaldo to Oswego (Illinois) | 4,718.16 mi (7,593.14 km) |
| Certaldo to Oswego (New York) | 4,162.05 mi (6,698.18 km) |
| Certaldo to Otsego (Minnesota) | 4,759.20 mi (7,659.19 km) |
| Certaldo to Ottawa (Illinois) | 4,752.09 mi (7,647.76 km) |
| Certaldo to Ottawa (Kansas) | 5,132.83 mi (8,260.49 km) |
| Certaldo to Ottumwa (Iowa) | 4,908.47 mi (7,899.41 km) |
| Certaldo to Overland (Missouri) | 4,933.82 mi (7,940.21 km) |
| Certaldo to Overland Park (Kansas) | 5,096.63 mi (8,202.23 km) |
| Certaldo to Overlea (Maryland) | 4,322.38 mi (6,956.20 km) |
| Certaldo to Oviedo (Florida) | 4,988.59 mi (8,028.36 km) |
| Certaldo to Owasso (Oklahoma) | 5,266.31 mi (8,475.31 km) |
| Certaldo to Owatonna (Minnesota) | 4,798.46 mi (7,722.37 km) |
| Certaldo to Owensboro (Kentucky) | 4,842.74 mi (7,793.64 km) |
| Certaldo to Owings Mills (Maryland) | 4,332.41 mi (6,972.34 km) |
| Certaldo to Owosso (Michigan) | 4,495.40 mi (7,234.65 km) |
