| Comacchio to Oberkirch | 328.54 mi (528.74 km) |
| Comacchio to Obernburg am Main | 382.62 mi (615.77 km) |
| Comacchio to Obernkirchen | 541.18 mi (870.95 km) |
| Comacchio to Oberschleissheim | 247.03 mi (397.55 km) |
| Comacchio to Oberstdorf | 208.28 mi (335.19 km) |
| Comacchio to Obertraubling | 294.74 mi (474.34 km) |
| Comacchio to Obertshausen | 402.46 mi (647.69 km) |
| Comacchio to Oberursel | 415.78 mi (669.13 km) |
| Comacchio to Ochsenfurt | 356.13 mi (573.13 km) |
| Comacchio to Ochsenhausen | 256.17 mi (412.26 km) |
| Comacchio to Ochtrup | 566.48 mi (911.67 km) |
| Comacchio to Odenthal | 496.34 mi (798.78 km) |
| Comacchio to Oelde | 526.41 mi (847.17 km) |
| Comacchio to Oelsnitz | 394.99 mi (635.67 km) |
| Comacchio to Oer-Erkenschwick | 530.48 mi (853.73 km) |
