| Hardenberg to Noventa Vicentina | 550.19 mi (885.45 km) |
| Hardenberg to Novi di Modena | 564.73 mi (908.84 km) |
| Hardenberg to Novi Ligure | 548.38 mi (882.54 km) |
| Hardenberg to Nuoro | 856.06 mi (1,377.69 km) |
| Hardenberg to Occhiobello | 574.28 mi (924.21 km) |
| Hardenberg to Oderzo | 538.36 mi (866.41 km) |
| Hardenberg to Oggiono | 484.58 mi (779.86 km) |
| Hardenberg to Olbia | 816.26 mi (1,313.64 km) |
| Hardenberg to Oleggio | 489.87 mi (788.38 km) |
| Hardenberg to Olgiate Comasco | 480.49 mi (773.27 km) |
| Hardenberg to Olgiate Olona | 489.84 mi (788.31 km) |
| Hardenberg to Omegna | 469.11 mi (754.95 km) |
| Hardenberg to Opera | 510.05 mi (820.85 km) |
| Hardenberg to Oppeano | 542.91 mi (873.73 km) |
| Hardenberg to Orbassano | 523.97 mi (843.25 km) |
