| Ilhavo to Oberkirch | 986.73 mi (1,587.98 km) |
| Ilhavo to Obernburg am Main | 1,071.96 mi (1,725.14 km) |
| Ilhavo to Obernkirchen | 1,163.28 mi (1,872.11 km) |
| Ilhavo to Oberschleissheim | 1,124.87 mi (1,810.31 km) |
| Ilhavo to Oberstdorf | 1,048.83 mi (1,687.92 km) |
| Ilhavo to Obertraubling | 1,168.30 mi (1,880.19 km) |
| Ilhavo to Obertshausen | 1,068.07 mi (1,718.89 km) |
| Ilhavo to Oberursel | 1,063.33 mi (1,711.26 km) |
| Ilhavo to Ochsenfurt | 1,101.94 mi (1,773.41 km) |
| Ilhavo to Ochsenhausen | 1,050.96 mi (1,691.36 km) |
| Ilhavo to Ochtrup | 1,097.02 mi (1,765.49 km) |
| Ilhavo to Odenthal | 1,043.44 mi (1,679.26 km) |
| Ilhavo to Oelde | 1,112.43 mi (1,790.28 km) |
| Ilhavo to Oelsnitz | 1,209.01 mi (1,945.72 km) |
| Ilhavo to Oer-Erkenschwick | 1,074.06 mi (1,728.53 km) |
