| Hennef to Oak Harbor (Washington) | 4,976.74 mi (8,009.30 km) |
| Hennef to Oak Hills (Oregon) | 5,145.98 mi (8,281.66 km) |
| Hennef to Oak Lawn (Illinois) | 4,262.99 mi (6,860.61 km) |
| Hennef to Oak Park (California) | 5,712.20 mi (9,192.90 km) |
| Hennef to Oak Park (Illinois) | 4,255.99 mi (6,849.36 km) |
| Hennef to Oak Park (Michigan) | 4,056.89 mi (6,528.93 km) |
| Hennef to Oak Ridge (Florida) | 4,666.87 mi (7,510.60 km) |
| Hennef to Oak Ridge (New Jersey) | 3,784.51 mi (6,090.58 km) |
| Hennef to Oak Ridge (Tennessee) | 4,410.77 mi (7,098.44 km) |
| Hennef to Oakdale (California) | 5,558.90 mi (8,946.18 km) |
| Hennef to Oakdale (Minnesota) | 4,289.62 mi (6,903.48 km) |
| Hennef to Oakland (California) | 5,594.53 mi (9,003.52 km) |
| Hennef to Oakland (New Jersey) | 3,774.32 mi (6,074.18 km) |
| Hennef to Oakland Park (Florida) | 4,730.02 mi (7,612.23 km) |
| Hennef to Oakleaf Plantation (Florida) | 4,598.89 mi (7,401.19 km) |
