| Mackworth to Orangevale (California) | 5,153.68 mi (8,294.05 km) |
| Mackworth to Orchards (Washington) | 4,785.58 mi (7,701.65 km) |
| Mackworth to Orcutt (California) | 5,351.51 mi (8,612.42 km) |
| Mackworth to Oregon (Ohio) | 3,701.62 mi (5,957.18 km) |
| Mackworth to Oregon (Wisconsin) | 3,865.69 mi (6,221.22 km) |
| Mackworth to Oregon City (Oregon) | 4,807.24 mi (7,736.51 km) |
| Mackworth to Orem (Utah) | 4,770.84 mi (7,677.92 km) |
| Mackworth to Orinda (California) | 5,228.68 mi (8,414.74 km) |
| Mackworth to Orland Park (Illinois) | 3,871.57 mi (6,230.68 km) |
| Mackworth to Orlando (Florida) | 4,262.23 mi (6,859.39 km) |
| Mackworth to Ormond Beach (Florida) | 4,210.78 mi (6,776.60 km) |
| Mackworth to Oro Valley (Arizona) | 5,183.66 mi (8,342.30 km) |
| Mackworth to Oroville (California) | 5,116.56 mi (8,234.30 km) |
| Mackworth to Oshkosh (Wisconsin) | 3,783.67 mi (6,089.22 km) |
| Mackworth to Oskaloosa (Iowa) | 4,063.75 mi (6,539.97 km) |
