| Zagarolo to Oswego (Illinois) | 4,862.96 mi (7,826.17 km) |
| Zagarolo to Oswego (New York) | 4,303.86 mi (6,926.39 km) |
| Zagarolo to Otsego (Minnesota) | 4,906.87 mi (7,896.85 km) |
| Zagarolo to Ottawa (Illinois) | 4,896.88 mi (7,880.76 km) |
| Zagarolo to Ottawa (Kansas) | 5,278.39 mi (8,494.76 km) |
| Zagarolo to Ottumwa (Iowa) | 5,054.22 mi (8,133.98 km) |
| Zagarolo to Overland (Missouri) | 5,077.71 mi (8,171.78 km) |
| Zagarolo to Overland Park (Kansas) | 5,242.13 mi (8,436.40 km) |
| Zagarolo to Overlea (Maryland) | 4,460.74 mi (7,178.87 km) |
| Zagarolo to Oviedo (Florida) | 5,119.55 mi (8,239.12 km) |
| Zagarolo to Owasso (Oklahoma) | 5,411.02 mi (8,708.19 km) |
| Zagarolo to Owatonna (Minnesota) | 4,945.65 mi (7,959.26 km) |
| Zagarolo to Owensboro (Kentucky) | 4,984.75 mi (8,022.18 km) |
| Zagarolo to Owings Mills (Maryland) | 4,470.95 mi (7,195.29 km) |
| Zagarolo to Owosso (Michigan) | 4,639.58 mi (7,466.68 km) |
