| Hillegom to Oerlinghausen | 174.57 mi (280.94 km) |
| Hillegom to Oestrich-Winkel | 216.34 mi (348.17 km) |
| Hillegom to Offenburg | 302.13 mi (486.23 km) |
| Hillegom to Oftersheim | 266.37 mi (428.69 km) |
| Hillegom to Ohrdruf | 282.55 mi (454.72 km) |
| Hillegom to Ohringen | 302.52 mi (486.86 km) |
| Hillegom to Olbernhau | 392.49 mi (631.65 km) |
| Hillegom to Olching | 409.72 mi (659.37 km) |
| Hillegom to Oldenburg | 163.16 mi (262.58 km) |
| Hillegom to Oldenburg in Holstein | 295.00 mi (474.76 km) |
| Hillegom to Olfen | 125.37 mi (201.76 km) |
| Hillegom to Olpe | 164.51 mi (264.75 km) |
| Hillegom to Olsberg | 178.59 mi (287.42 km) |
| Hillegom to Oranienburg | 365.06 mi (587.50 km) |
| Hillegom to Ortenberg | 234.51 mi (377.41 km) |
