| Quattro Castella to Oberkirch | 292.23 mi (470.30 km) |
| Quattro Castella to Obernburg am Main | 365.06 mi (587.51 km) |
| Quattro Castella to Obernkirchen | 530.98 mi (854.53 km) |
| Quattro Castella to Oberschleissheim | 255.31 mi (410.88 km) |
| Quattro Castella to Oberstdorf | 192.04 mi (309.06 km) |
| Quattro Castella to Obertraubling | 309.94 mi (498.80 km) |
| Quattro Castella to Obertshausen | 383.09 mi (616.53 km) |
| Quattro Castella to Oberursel | 394.82 mi (635.41 km) |
| Quattro Castella to Ochsenfurt | 347.13 mi (558.65 km) |
| Quattro Castella to Ochsenhausen | 238.89 mi (384.45 km) |
| Quattro Castella to Ochtrup | 544.19 mi (875.79 km) |
| Quattro Castella to Odenthal | 468.57 mi (754.09 km) |
| Quattro Castella to Oelde | 508.70 mi (818.67 km) |
| Quattro Castella to Oelsnitz | 407.36 mi (655.58 km) |
| Quattro Castella to Oer-Erkenschwick | 506.33 mi (814.86 km) |
