| Boppard to Novi di Modena | 399.70 mi (643.26 km) |
| Boppard to Novi Ligure | 382.17 mi (615.04 km) |
| Boppard to Nuoro | 690.21 mi (1,110.78 km) |
| Boppard to Occhiobello | 411.18 mi (661.73 km) |
| Boppard to Oderzo | 381.80 mi (614.45 km) |
| Boppard to Oggiono | 317.89 mi (511.59 km) |
| Boppard to Olbia | 650.11 mi (1,046.26 km) |
| Boppard to Oleggio | 323.61 mi (520.80 km) |
| Boppard to Olgiate Comasco | 313.83 mi (505.06 km) |
| Boppard to Olgiate Olona | 323.27 mi (520.25 km) |
| Boppard to Omegna | 303.13 mi (487.84 km) |
| Boppard to Opera | 343.34 mi (552.55 km) |
| Boppard to Oppeano | 379.27 mi (610.38 km) |
| Boppard to Orbassano | 360.96 mi (580.91 km) |
| Boppard to Orbetello | 565.24 mi (909.66 km) |
