| Hillegom to Octeville | 327.12 mi (526.45 km) |
| Hillegom to Oignies | 142.86 mi (229.91 km) |
| Hillegom to Oissel | 253.99 mi (408.76 km) |
| Hillegom to Olivet | 327.65 mi (527.30 km) |
| Hillegom to Ollioules | 634.48 mi (1,021.10 km) |
| Hillegom to Olonne-sur-Mer | 488.81 mi (786.66 km) |
| Hillegom to Oloron-Sainte-Marie | 672.27 mi (1,081.92 km) |
| Hillegom to Onet Village | 554.59 mi (892.52 km) |
| Hillegom to Onnaing | 137.69 mi (221.60 km) |
| Hillegom to Orange | 562.86 mi (905.84 km) |
| Hillegom to Orchies | 137.65 mi (221.53 km) |
| Hillegom to Orleans | 325.01 mi (523.05 km) |
| Hillegom to Orly | 262.77 mi (422.89 km) |
| Hillegom to Ormesson-sur-Marne | 257.78 mi (414.85 km) |
| Hillegom to Orsay | 269.13 mi (433.13 km) |
