| Zagarolo to Orangevale (California) | 6,168.88 mi (9,927.85 km) |
| Zagarolo to Orchards (Washington) | 5,794.45 mi (9,325.27 km) |
| Zagarolo to Orcutt (California) | 6,367.28 mi (10,247.14 km) |
| Zagarolo to Oregon (Ohio) | 4,664.52 mi (7,506.82 km) |
| Zagarolo to Oregon (Wisconsin) | 4,850.39 mi (7,805.95 km) |
| Zagarolo to Oregon City (Oregon) | 5,816.43 mi (9,360.64 km) |
| Zagarolo to Orem (Utah) | 5,785.12 mi (9,310.25 km) |
| Zagarolo to Orinda (California) | 6,243.74 mi (10,048.33 km) |
| Zagarolo to Orland Park (Illinois) | 4,847.18 mi (7,800.79 km) |
| Zagarolo to Orlando (Florida) | 5,134.50 mi (8,263.19 km) |
| Zagarolo to Ormond Beach (Florida) | 5,087.51 mi (8,187.55 km) |
| Zagarolo to Oro Valley (Arizona) | 6,188.28 mi (9,959.08 km) |
| Zagarolo to Oroville (California) | 6,131.27 mi (9,867.32 km) |
| Zagarolo to Oshkosh (Wisconsin) | 4,770.49 mi (7,677.35 km) |
| Zagarolo to Oskaloosa (Iowa) | 5,050.44 mi (8,127.89 km) |
