| Duffel to Oak Harbor (Washington) | 4,892.33 mi (7,873.45 km) |
| Duffel to Oak Hills (Oregon) | 5,059.49 mi (8,142.46 km) |
| Duffel to Oak Lawn (Illinois) | 4,148.85 mi (6,676.92 km) |
| Duffel to Oak Park (California) | 5,613.55 mi (9,034.14 km) |
| Duffel to Oak Park (Illinois) | 4,141.98 mi (6,665.87 km) |
| Duffel to Oak Park (Michigan) | 3,941.24 mi (6,342.81 km) |
| Duffel to Oak Ridge (Florida) | 4,545.29 mi (7,314.94 km) |
| Duffel to Oak Ridge (New Jersey) | 3,665.10 mi (5,898.41 km) |
| Duffel to Oak Ridge (Tennessee) | 4,292.20 mi (6,907.62 km) |
| Duffel to Oakdale (California) | 5,464.63 mi (8,794.47 km) |
| Duffel to Oakdale (Minnesota) | 4,180.44 mi (6,727.77 km) |
| Duffel to Oakland (California) | 5,501.58 mi (8,853.94 km) |
| Duffel to Oakland (New Jersey) | 3,654.83 mi (5,881.89 km) |
| Duffel to Oakland Park (Florida) | 4,607.92 mi (7,415.73 km) |
| Duffel to Oakleaf Plantation (Florida) | 4,477.75 mi (7,206.24 km) |
