| Hilliard to Oberkirch | 4,276.75 mi (6,882.77 km) |
| Hilliard to Obernburg am Main | 4,273.34 mi (6,877.28 km) |
| Hilliard to Obernkirchen | 4,190.59 mi (6,744.10 km) |
| Hilliard to Oberschleissheim | 4,423.97 mi (7,119.70 km) |
| Hilliard to Oberstdorf | 4,403.72 mi (7,087.10 km) |
| Hilliard to Obertraubling | 4,421.07 mi (7,115.02 km) |
| Hilliard to Obertshausen | 4,253.69 mi (6,845.65 km) |
| Hilliard to Oberursel | 4,239.16 mi (6,822.27 km) |
| Hilliard to Ochsenfurt | 4,315.66 mi (6,945.39 km) |
| Hilliard to Ochsenhausen | 4,366.79 mi (7,027.66 km) |
| Hilliard to Ochtrup | 4,120.58 mi (6,631.44 km) |
| Hilliard to Odenthal | 4,155.49 mi (6,687.61 km) |
| Hilliard to Oelde | 4,168.68 mi (6,708.84 km) |
| Hilliard to Oelsnitz | 4,368.43 mi (7,030.31 km) |
| Hilliard to Oer-Erkenschwick | 4,140.92 mi (6,664.16 km) |
