| Hardinxveld-Giessendam to Noventa Vicentina | 545.09 mi (877.24 km) |
| Hardinxveld-Giessendam to Novi di Modena | 553.12 mi (890.16 km) |
| Hardinxveld-Giessendam to Novi Ligure | 520.18 mi (837.15 km) |
| Hardinxveld-Giessendam to Nuoro | 822.93 mi (1,324.37 km) |
| Hardinxveld-Giessendam to Occhiobello | 567.70 mi (913.62 km) |
| Hardinxveld-Giessendam to Oderzo | 542.95 mi (873.79 km) |
| Hardinxveld-Giessendam to Oggiono | 464.57 mi (747.66 km) |
| Hardinxveld-Giessendam to Olbia | 784.88 mi (1,263.14 km) |
| Hardinxveld-Giessendam to Oleggio | 463.00 mi (745.12 km) |
| Hardinxveld-Giessendam to Olgiate Comasco | 457.16 mi (735.73 km) |
| Hardinxveld-Giessendam to Olgiate Olona | 465.22 mi (748.70 km) |
| Hardinxveld-Giessendam to Omegna | 441.18 mi (710.01 km) |
| Hardinxveld-Giessendam to Opera | 487.32 mi (784.27 km) |
| Hardinxveld-Giessendam to Oppeano | 535.32 mi (861.52 km) |
| Hardinxveld-Giessendam to Orbassano | 486.46 mi (782.88 km) |
