| Alenquer to Nuth | 1,092.43 mi (1,758.09 km) |
| Alenquer to Oegstgeest | 1,113.25 mi (1,791.60 km) |
| Alenquer to Oirschot | 1,102.49 mi (1,774.28 km) |
| Alenquer to Oisterwijk | 1,103.63 mi (1,776.12 km) |
| Alenquer to Oldebroek | 1,167.50 mi (1,878.92 km) |
| Alenquer to Oldenzaal | 1,191.64 mi (1,917.76 km) |
| Alenquer to Ommen | 1,185.91 mi (1,908.54 km) |
| Alenquer to Oosterend | 1,200.22 mi (1,931.57 km) |
| Alenquer to Oosterhout | 1,096.52 mi (1,764.68 km) |
| Alenquer to Oosterwolde | 1,205.91 mi (1,940.73 km) |
| Alenquer to Oostzaan | 1,137.83 mi (1,831.16 km) |
| Alenquer to Opmeer | 1,153.58 mi (1,856.51 km) |
| Alenquer to Oss | 1,122.17 mi (1,805.96 km) |
| Alenquer to Oud-Beijerland | 1,092.29 mi (1,757.87 km) |
| Alenquer to Oudenbosch | 1,084.11 mi (1,744.71 km) |
