| Haarlem to Oerlinghausen | 173.28 mi (278.87 km) |
| Haarlem to Oestrich-Winkel | 219.88 mi (353.87 km) |
| Haarlem to Offenburg | 307.06 mi (494.16 km) |
| Haarlem to Oftersheim | 270.11 mi (434.71 km) |
| Haarlem to Ohrdruf | 282.83 mi (455.16 km) |
| Haarlem to Ohringen | 305.74 mi (492.04 km) |
| Haarlem to Olbernhau | 392.07 mi (630.97 km) |
| Haarlem to Olching | 412.69 mi (664.16 km) |
| Haarlem to Oldenburg | 158.64 mi (255.30 km) |
| Haarlem to Oldenburg in Holstein | 289.70 mi (466.23 km) |
| Haarlem to Olfen | 125.59 mi (202.12 km) |
| Haarlem to Olpe | 166.39 mi (267.78 km) |
| Haarlem to Olsberg | 179.07 mi (288.19 km) |
| Haarlem to Oranienburg | 362.00 mi (582.59 km) |
| Haarlem to Ortenberg | 236.59 mi (380.75 km) |
