| Oliveira de Frades to Nuth | 974.30 mi (1,567.98 km) |
| Oliveira de Frades to Oegstgeest | 992.12 mi (1,596.67 km) |
| Oliveira de Frades to Oirschot | 982.87 mi (1,581.78 km) |
| Oliveira de Frades to Oisterwijk | 983.81 mi (1,583.29 km) |
| Oliveira de Frades to Oldebroek | 1,047.13 mi (1,685.20 km) |
| Oliveira de Frades to Oldenzaal | 1,072.24 mi (1,725.61 km) |
| Oliveira de Frades to Ommen | 1,065.85 mi (1,715.32 km) |
| Oliveira de Frades to Oosterend | 1,079.35 mi (1,737.05 km) |
| Oliveira de Frades to Oosterhout | 976.32 mi (1,571.24 km) |
| Oliveira de Frades to Oosterwolde | 1,085.21 mi (1,746.47 km) |
| Oliveira de Frades to Oostzaan | 1,016.74 mi (1,636.29 km) |
| Oliveira de Frades to Opmeer | 1,032.28 mi (1,661.29 km) |
| Oliveira de Frades to Oss | 1,002.37 mi (1,613.16 km) |
| Oliveira de Frades to Oud-Beijerland | 971.51 mi (1,563.49 km) |
| Oliveira de Frades to Oudenbosch | 963.71 mi (1,550.93 km) |
