| Campobasso to Oberkirch | 578.27 mi (930.64 km) |
| Campobasso to Obernburg am Main | 630.32 mi (1,014.40 km) |
| Campobasso to Obernkirchen | 783.71 mi (1,261.26 km) |
| Campobasso to Oberschleissheim | 485.94 mi (782.05 km) |
| Campobasso to Oberstdorf | 457.80 mi (736.76 km) |
| Campobasso to Obertraubling | 525.40 mi (845.55 km) |
| Campobasso to Obertshausen | 650.52 mi (1,046.92 km) |
| Campobasso to Oberursel | 664.19 mi (1,068.91 km) |
| Campobasso to Ochsenfurt | 600.84 mi (966.96 km) |
| Campobasso to Ochsenhausen | 505.25 mi (813.12 km) |
| Campobasso to Ochtrup | 814.43 mi (1,310.70 km) |
| Campobasso to Odenthal | 745.88 mi (1,200.38 km) |
| Campobasso to Oelde | 772.89 mi (1,243.85 km) |
| Campobasso to Oelsnitz | 623.04 mi (1,002.69 km) |
| Campobasso to Oer-Erkenschwick | 779.14 mi (1,253.91 km) |
