| Cologno al Serio to Oberkirch | 217.55 mi (350.12 km) |
| Cologno al Serio to Obernburg am Main | 295.25 mi (475.16 km) |
| Cologno al Serio to Obernkirchen | 462.51 mi (744.34 km) |
| Cologno al Serio to Oberschleissheim | 204.21 mi (328.65 km) |
| Cologno al Serio to Oberstdorf | 129.16 mi (207.87 km) |
| Cologno al Serio to Obertraubling | 260.72 mi (419.59 km) |
| Cologno al Serio to Obertshausen | 312.36 mi (502.70 km) |
| Cologno al Serio to Oberursel | 323.41 mi (520.48 km) |
| Cologno al Serio to Ochsenfurt | 281.50 mi (453.03 km) |
| Cologno al Serio to Ochsenhausen | 172.37 mi (277.40 km) |
| Cologno al Serio to Ochtrup | 471.47 mi (758.75 km) |
| Cologno al Serio to Odenthal | 394.76 mi (635.31 km) |
| Cologno al Serio to Oelde | 437.55 mi (704.17 km) |
| Cologno al Serio to Oelsnitz | 352.84 mi (567.84 km) |
| Cologno al Serio to Oer-Erkenschwick | 433.26 mi (697.26 km) |
