| Monte San Giovanni Campano to Oberkirch | 545.14 mi (877.32 km) |
| Monte San Giovanni Campano to Obernburg am Main | 604.74 mi (973.24 km) |
| Monte San Giovanni Campano to Obernkirchen | 763.04 mi (1,228.00 km) |
| Monte San Giovanni Campano to Oberschleissheim | 466.97 mi (751.51 km) |
| Monte San Giovanni Campano to Oberstdorf | 429.70 mi (691.53 km) |
| Monte San Giovanni Campano to Obertraubling | 510.83 mi (822.11 km) |
| Monte San Giovanni Campano to Obertshausen | 624.45 mi (1,004.95 km) |
| Monte San Giovanni Campano to Oberursel | 637.60 mi (1,026.12 km) |
| Monte San Giovanni Campano to Ochsenfurt | 578.26 mi (930.62 km) |
| Monte San Giovanni Campano to Ochsenhausen | 477.85 mi (769.03 km) |
| Monte San Giovanni Campano to Ochtrup | 788.39 mi (1,268.79 km) |
| Monte San Giovanni Campano to Odenthal | 717.00 mi (1,153.90 km) |
| Monte San Giovanni Campano to Oelde | 748.66 mi (1,204.85 km) |
| Monte San Giovanni Campano to Oelsnitz | 610.29 mi (982.17 km) |
| Monte San Giovanni Campano to Oer-Erkenschwick | 752.04 mi (1,210.30 km) |
