| Boppard to Obernburg am Main | 73.94 mi (118.99 km) |
| Boppard to Obernkirchen | 155.33 mi (249.98 km) |
| Boppard to Oberschleissheim | 225.58 mi (363.03 km) |
| Boppard to Oberstdorf | 230.11 mi (370.33 km) |
| Boppard to Obertraubling | 222.76 mi (358.49 km) |
| Boppard to Obertshausen | 56.17 mi (90.40 km) |
| Boppard to Oberursel | 43.64 mi (70.23 km) |
| Boppard to Ochsenfurt | 117.19 mi (188.60 km) |
| Boppard to Ochsenhausen | 183.30 mi (294.99 km) |
| Boppard to Ochtrup | 137.50 mi (221.29 km) |
| Boppard to Odenthal | 59.17 mi (95.23 km) |
| Boppard to Oelde | 113.32 mi (182.36 km) |
| Boppard to Oelsnitz | 202.23 mi (325.45 km) |
| Boppard to Oer-Erkenschwick | 98.59 mi (158.67 km) |
| Boppard to Oerlinghausen | 128.66 mi (207.06 km) |
