| Castelli Calepio to Oberkirch | 217.82 mi (350.55 km) |
| Castelli Calepio to Obernburg am Main | 292.78 mi (471.18 km) |
| Castelli Calepio to Obernkirchen | 459.67 mi (739.76 km) |
| Castelli Calepio to Oberschleissheim | 197.14 mi (317.27 km) |
| Castelli Calepio to Oberstdorf | 124.05 mi (199.65 km) |
| Castelli Calepio to Obertraubling | 253.54 mi (408.04 km) |
| Castelli Calepio to Obertshausen | 310.28 mi (499.34 km) |
| Castelli Calepio to Oberursel | 321.63 mi (517.61 km) |
| Castelli Calepio to Ochsenfurt | 277.64 mi (446.81 km) |
| Castelli Calepio to Ochsenhausen | 168.53 mi (271.22 km) |
| Castelli Calepio to Ochtrup | 470.38 mi (757.01 km) |
| Castelli Calepio to Odenthal | 394.32 mi (634.60 km) |
| Castelli Calepio to Oelde | 435.70 mi (701.20 km) |
| Castelli Calepio to Oelsnitz | 346.66 mi (557.89 km) |
| Castelli Calepio to Oer-Erkenschwick | 432.36 mi (695.81 km) |
