| Boppard to Oak Harbor (Washington) | 5,016.20 mi (8,072.79 km) |
| Boppard to Oak Hills (Oregon) | 5,185.21 mi (8,344.80 km) |
| Boppard to Oak Lawn (Illinois) | 4,294.91 mi (6,911.99 km) |
| Boppard to Oak Park (California) | 5,749.51 mi (9,252.94 km) |
| Boppard to Oak Park (Illinois) | 4,287.99 mi (6,900.85 km) |
| Boppard to Oak Park (Michigan) | 4,087.91 mi (6,578.85 km) |
| Boppard to Oak Ridge (Florida) | 4,691.64 mi (7,550.46 km) |
| Boppard to Oak Ridge (New Jersey) | 3,812.47 mi (6,135.58 km) |
| Boppard to Oak Ridge (Tennessee) | 4,439.56 mi (7,144.79 km) |
| Boppard to Oakdale (California) | 5,597.04 mi (9,007.57 km) |
| Boppard to Oakdale (Minnesota) | 4,323.84 mi (6,958.54 km) |
| Boppard to Oakland (California) | 5,632.90 mi (9,065.27 km) |
| Boppard to Oakland (New Jersey) | 3,802.20 mi (6,119.05 km) |
| Boppard to Oakland Park (Florida) | 4,753.33 mi (7,649.74 km) |
| Boppard to Oakleaf Plantation (Florida) | 4,624.51 mi (7,442.43 km) |
