| Hillegom to Noventa Vicentina | 577.37 mi (929.18 km) |
| Hillegom to Novi di Modena | 586.06 mi (943.17 km) |
| Hillegom to Novi Ligure | 554.05 mi (891.66 km) |
| Hillegom to Nuoro | 856.86 mi (1,378.99 km) |
| Hillegom to Occhiobello | 600.16 mi (965.87 km) |
| Hillegom to Oderzo | 573.96 mi (923.70 km) |
| Hillegom to Oggiono | 498.05 mi (801.54 km) |
| Hillegom to Olbia | 818.82 mi (1,317.76 km) |
| Hillegom to Oleggio | 496.81 mi (799.53 km) |
| Hillegom to Olgiate Comasco | 490.82 mi (789.90 km) |
| Hillegom to Olgiate Olona | 498.95 mi (802.98 km) |
| Hillegom to Omegna | 475.01 mi (764.46 km) |
| Hillegom to Opera | 520.97 mi (838.43 km) |
| Hillegom to Oppeano | 567.85 mi (913.87 km) |
| Hillegom to Orbassano | 520.37 mi (837.46 km) |
