| Pioltello to Orangevale (California) | 5,861.10 mi (9,432.54 km) |
| Pioltello to Orchards (Washington) | 5,487.36 mi (8,831.05 km) |
| Pioltello to Orcutt (California) | 6,059.99 mi (9,752.61 km) |
| Pioltello to Oregon (Ohio) | 4,376.06 mi (7,042.58 km) |
| Pioltello to Oregon (Wisconsin) | 4,555.01 mi (7,330.59 km) |
| Pioltello to Oregon City (Oregon) | 5,509.28 mi (8,866.33 km) |
| Pioltello to Orem (Utah) | 5,478.90 mi (8,817.43 km) |
| Pioltello to Orinda (California) | 5,935.95 mi (9,552.99 km) |
| Pioltello to Orland Park (Illinois) | 4,554.79 mi (7,330.23 km) |
| Pioltello to Orlando (Florida) | 4,874.98 mi (7,845.52 km) |
| Pioltello to Ormond Beach (Florida) | 4,826.51 mi (7,767.51 km) |
| Pioltello to Oro Valley (Arizona) | 5,886.27 mi (9,473.03 km) |
| Pioltello to Oroville (California) | 5,823.47 mi (9,371.96 km) |
| Pioltello to Oshkosh (Wisconsin) | 4,474.36 mi (7,200.79 km) |
| Pioltello to Oskaloosa (Iowa) | 4,754.50 mi (7,651.63 km) |
