| Puerto Real to Nuth | 1,159.28 mi (1,865.68 km) |
| Puerto Real to Oegstgeest | 1,200.01 mi (1,931.22 km) |
| Puerto Real to Oirschot | 1,178.31 mi (1,896.30 km) |
| Puerto Real to Oisterwijk | 1,180.81 mi (1,900.32 km) |
| Puerto Real to Oldebroek | 1,247.27 mi (2,007.28 km) |
| Puerto Real to Oldenzaal | 1,264.16 mi (2,034.47 km) |
| Puerto Real to Ommen | 1,263.10 mi (2,032.76 km) |
| Puerto Real to Oosterend | 1,283.23 mi (2,065.16 km) |
| Puerto Real to Oosterhout | 1,176.46 mi (1,893.32 km) |
| Puerto Real to Oosterwolde | 1,287.51 mi (2,072.04 km) |
| Puerto Real to Oostzaan | 1,223.78 mi (1,969.49 km) |
| Puerto Real to Opmeer | 1,241.10 mi (1,997.36 km) |
| Puerto Real to Oss | 1,198.82 mi (1,929.31 km) |
| Puerto Real to Oud-Beijerland | 1,176.66 mi (1,893.66 km) |
| Puerto Real to Oudenbosch | 1,165.84 mi (1,876.24 km) |
