| Hilo to Oberkirch | 7,609.92 mi (12,246.99 km) |
| Hilo to Obernburg am Main | 7,536.67 mi (12,129.11 km) |
| Hilo to Obernkirchen | 7,374.94 mi (11,868.82 km) |
| Hilo to Oberschleissheim | 7,670.64 mi (12,344.70 km) |
| Hilo to Oberstdorf | 7,712.34 mi (12,411.82 km) |
| Hilo to Obertraubling | 7,628.71 mi (12,277.22 km) |
| Hilo to Obertshausen | 7,517.87 mi (12,098.84 km) |
| Hilo to Oberursel | 7,505.65 mi (12,079.17 km) |
| Hilo to Ochsenfurt | 7,560.22 mi (12,166.99 km) |
| Hilo to Ochsenhausen | 7,664.15 mi (12,334.26 km) |
| Hilo to Ochtrup | 7,355.86 mi (11,838.11 km) |
| Hilo to Odenthal | 7,432.17 mi (11,960.92 km) |
| Hilo to Oelde | 7,392.36 mi (11,896.85 km) |
| Hilo to Oelsnitz | 7,530.93 mi (12,119.86 km) |
| Hilo to Oer-Erkenschwick | 7,393.78 mi (11,899.14 km) |
