| Hennef to Oakley (California) | 5,568.27 mi (8,961.27 km) |
| Hennef to Oakton (Virginia) | 3,993.74 mi (6,427.31 km) |
| Hennef to Oakville (Missouri) | 4,518.92 mi (7,272.49 km) |
| Hennef to Oatfield (Oregon) | 5,147.60 mi (8,284.27 km) |
| Hennef to Ocala (Florida) | 4,661.74 mi (7,502.34 km) |
| Hennef to Ocean Acres (New Jersey) | 3,833.45 mi (6,169.34 km) |
| Hennef to Ocean City (New Jersey) | 3,867.86 mi (6,224.72 km) |
| Hennef to Ocean Pines (Maryland) | 3,930.22 mi (6,325.07 km) |
| Hennef to Ocean Pointe (Hawaii) | 7,375.50 mi (11,869.72 km) |
| Hennef to Ocean Springs (Mississippi) | 4,868.18 mi (7,834.58 km) |
| Hennef to Oceanside (California) | 5,725.28 mi (9,213.95 km) |
| Hennef to Oceanside (New York) | 3,767.76 mi (6,063.63 km) |
| Hennef to Ocoee (Florida) | 4,666.31 mi (7,509.70 km) |
| Hennef to Oconomowoc (Wisconsin) | 4,223.37 mi (6,796.85 km) |
| Hennef to Odenton (Maryland) | 3,961.24 mi (6,375.00 km) |
