| Hadamar to Novi di Modena | 406.11 mi (653.57 km) |
| Hadamar to Novi Ligure | 394.68 mi (635.18 km) |
| Hadamar to Nuoro | 702.88 mi (1,131.17 km) |
| Hadamar to Occhiobello | 415.67 mi (668.96 km) |
| Hadamar to Oderzo | 382.04 mi (614.84 km) |
| Hadamar to Oggiono | 327.95 mi (527.79 km) |
| Hadamar to Olbia | 662.36 mi (1,065.97 km) |
| Hadamar to Oleggio | 336.18 mi (541.03 km) |
| Hadamar to Olgiate Comasco | 325.19 mi (523.34 km) |
| Hadamar to Olgiate Olona | 335.01 mi (539.15 km) |
| Hadamar to Omegna | 316.31 mi (509.06 km) |
| Hadamar to Opera | 354.21 mi (570.04 km) |
| Hadamar to Oppeano | 384.23 mi (618.36 km) |
| Hadamar to Orbassano | 376.81 mi (606.41 km) |
| Hadamar to Orbetello | 573.45 mi (922.88 km) |
