| Hennef to Odessa (Texas) | 5,304.38 mi (8,536.58 km) |
| Hennef to Ogden (Utah) | 5,102.13 mi (8,211.09 km) |
| Hennef to Oildale (California) | 5,646.22 mi (9,086.71 km) |
| Hennef to Ojus (Florida) | 4,741.60 mi (7,630.86 km) |
| Hennef to Okemos (Michigan) | 4,091.86 mi (6,585.20 km) |
| Hennef to Oklahoma City (Oklahoma) | 4,937.11 mi (7,945.51 km) |
| Hennef to Okmulgee (Oklahoma) | 4,874.49 mi (7,844.74 km) |
| Hennef to Olathe (Kansas) | 4,661.80 mi (7,502.44 km) |
| Hennef to Old Jamestown (Missouri) | 4,498.03 mi (7,238.88 km) |
| Hennef to Oldsmar (Florida) | 4,740.18 mi (7,628.58 km) |
| Hennef to Olean (New York) | 3,892.56 mi (6,264.47 km) |
| Hennef to Olive Branch (Mississippi) | 4,676.85 mi (7,526.66 km) |
| Hennef to Olivehurst (California) | 5,499.49 mi (8,850.57 km) |
| Hennef to Olney (Maryland) | 3,972.66 mi (6,393.38 km) |
| Hennef to Olympia (Washington) | 5,057.66 mi (8,139.51 km) |
