| Alcazar de San Juan to Nuth | 908.72 mi (1,462.44 km) |
| Alcazar de San Juan to Oegstgeest | 955.81 mi (1,538.22 km) |
| Alcazar de San Juan to Oirschot | 930.32 mi (1,497.21 km) |
| Alcazar de San Juan to Oisterwijk | 933.26 mi (1,501.93 km) |
| Alcazar de San Juan to Oldebroek | 1,000.06 mi (1,609.43 km) |
| Alcazar de San Juan to Oldenzaal | 1,014.51 mi (1,632.70 km) |
| Alcazar de San Juan to Ommen | 1,014.90 mi (1,633.33 km) |
| Alcazar de San Juan to Oosterend | 1,036.88 mi (1,668.70 km) |
| Alcazar de San Juan to Oosterhout | 929.91 mi (1,496.54 km) |
| Alcazar de San Juan to Oosterwolde | 1,040.62 mi (1,674.72 km) |
| Alcazar de San Juan to Oostzaan | 979.04 mi (1,575.61 km) |
| Alcazar de San Juan to Opmeer | 996.81 mi (1,604.21 km) |
| Alcazar de San Juan to Oss | 950.94 mi (1,530.39 km) |
| Alcazar de San Juan to Oud-Beijerland | 931.76 mi (1,499.53 km) |
| Alcazar de San Juan to Oudenbosch | 920.05 mi (1,480.67 km) |
