| Hennef to Orangevale (California) | 5,513.83 mi (8,873.64 km) |
| Hennef to Orchards (Washington) | 5,129.56 mi (8,255.23 km) |
| Hennef to Orcutt (California) | 5,719.58 mi (9,204.78 km) |
| Hennef to Oregon (Ohio) | 4,104.26 mi (6,605.18 km) |
| Hennef to Oregon (Wisconsin) | 4,264.12 mi (6,862.43 km) |
| Hennef to Oregon City (Oregon) | 5,151.79 mi (8,291.00 km) |
| Hennef to Orem (Utah) | 5,146.65 mi (8,282.74 km) |
| Hennef to Orinda (California) | 5,588.08 mi (8,993.15 km) |
| Hennef to Orland Park (Illinois) | 4,272.15 mi (6,875.37 km) |
| Hennef to Orlando (Florida) | 4,663.32 mi (7,504.89 km) |
| Hennef to Ormond Beach (Florida) | 4,612.26 mi (7,422.71 km) |
| Hennef to Oro Valley (Arizona) | 5,571.52 mi (8,966.49 km) |
| Hennef to Oroville (California) | 5,474.53 mi (8,810.41 km) |
| Hennef to Oshkosh (Wisconsin) | 4,181.55 mi (6,729.56 km) |
| Hennef to Oskaloosa (Iowa) | 4,461.41 mi (7,179.94 km) |
