| Busto Arsizio to Oberkirch | 205.05 mi (330.00 km) |
| Busto Arsizio to Obernburg am Main | 292.44 mi (470.63 km) |
| Busto Arsizio to Obernkirchen | 459.93 mi (740.19 km) |
| Busto Arsizio to Oberschleissheim | 222.75 mi (358.47 km) |
| Busto Arsizio to Oberstdorf | 141.54 mi (227.78 km) |
| Busto Arsizio to Obertraubling | 278.93 mi (448.89 km) |
| Busto Arsizio to Obertshausen | 307.79 mi (495.34 km) |
| Busto Arsizio to Oberursel | 317.48 mi (510.94 km) |
| Busto Arsizio to Ochsenfurt | 284.66 mi (458.12 km) |
| Busto Arsizio to Ochsenhausen | 177.70 mi (285.98 km) |
| Busto Arsizio to Ochtrup | 461.75 mi (743.11 km) |
| Busto Arsizio to Odenthal | 382.93 mi (616.27 km) |
| Busto Arsizio to Oelde | 431.03 mi (693.68 km) |
| Busto Arsizio to Oelsnitz | 365.53 mi (588.26 km) |
| Busto Arsizio to Oer-Erkenschwick | 422.98 mi (680.73 km) |
