| Cal to Nuth | 1,448.42 mi (2,331.01 km) |
| Cal to Oegstgeest | 1,544.03 mi (2,484.88 km) |
| Cal to Oirschot | 1,489.98 mi (2,397.89 km) |
| Cal to Oisterwijk | 1,496.53 mi (2,408.43 km) |
| Cal to Oldebroek | 1,501.33 mi (2,416.15 km) |
| Cal to Oldenzaal | 1,459.69 mi (2,349.14 km) |
| Cal to Ommen | 1,485.47 mi (2,390.64 km) |
| Cal to Oosterend | 1,516.16 mi (2,440.03 km) |
| Cal to Oosterhout | 1,511.41 mi (2,432.39 km) |
| Cal to Oosterwolde | 1,507.86 mi (2,426.67 km) |
| Cal to Oostzaan | 1,537.35 mi (2,474.13 km) |
| Cal to Opmeer | 1,544.36 mi (2,485.40 km) |
| Cal to Oss | 1,490.96 mi (2,399.46 km) |
| Cal to Oud-Beijerland | 1,534.32 mi (2,469.25 km) |
| Cal to Oudenbosch | 1,522.22 mi (2,449.77 km) |
