| Cassino to Oberkirch | 560.89 mi (902.66 km) |
| Cassino to Obernburg am Main | 618.85 mi (995.94 km) |
| Cassino to Obernkirchen | 776.08 mi (1,248.97 km) |
| Cassino to Oberschleissheim | 479.34 mi (771.43 km) |
| Cassino to Oberstdorf | 444.23 mi (714.92 km) |
| Cassino to Obertraubling | 522.13 mi (840.29 km) |
| Cassino to Obertshausen | 638.69 mi (1,027.87 km) |
| Cassino to Oberursel | 651.97 mi (1,049.24 km) |
| Cassino to Ochsenfurt | 591.64 mi (952.16 km) |
| Cassino to Ochsenhausen | 492.28 mi (792.24 km) |
| Cassino to Ochtrup | 802.70 mi (1,291.83 km) |
| Cassino to Odenthal | 731.92 mi (1,177.92 km) |
| Cassino to Oelde | 762.54 mi (1,227.19 km) |
| Cassino to Oelsnitz | 621.22 mi (999.76 km) |
| Cassino to Oer-Erkenschwick | 766.58 mi (1,233.70 km) |
