| Alkmaar to Oerlinghausen | 171.75 mi (276.41 km) |
| Alkmaar to Oestrich-Winkel | 229.74 mi (369.72 km) |
| Alkmaar to Offenburg | 319.94 mi (514.89 km) |
| Alkmaar to Oftersheim | 280.30 mi (451.11 km) |
| Alkmaar to Ohrdruf | 284.67 mi (458.13 km) |
| Alkmaar to Ohringen | 314.64 mi (506.36 km) |
| Alkmaar to Olbernhau | 391.95 mi (630.79 km) |
| Alkmaar to Olching | 420.87 mi (677.32 km) |
| Alkmaar to Oldenburg | 148.64 mi (239.21 km) |
| Alkmaar to Oldenburg in Holstein | 277.18 mi (446.09 km) |
| Alkmaar to Olfen | 128.29 mi (206.46 km) |
| Alkmaar to Olpe | 172.64 mi (277.83 km) |
| Alkmaar to Olsberg | 181.88 mi (292.70 km) |
| Alkmaar to Oranienburg | 355.29 mi (571.78 km) |
| Alkmaar to Ortenberg | 242.95 mi (390.99 km) |
