| Penafiel to Nuth | 951.64 mi (1,531.51 km) |
| Penafiel to Oegstgeest | 966.79 mi (1,555.90 km) |
| Penafiel to Oirschot | 958.98 mi (1,543.33 km) |
| Penafiel to Oisterwijk | 959.74 mi (1,544.55 km) |
| Penafiel to Oldebroek | 1,022.52 mi (1,645.59 km) |
| Penafiel to Oldenzaal | 1,048.49 mi (1,687.38 km) |
| Penafiel to Ommen | 1,041.51 mi (1,676.15 km) |
| Penafiel to Oosterend | 1,054.24 mi (1,696.63 km) |
| Penafiel to Oosterhout | 951.92 mi (1,531.96 km) |
| Penafiel to Oosterwolde | 1,060.25 mi (1,706.32 km) |
| Penafiel to Oostzaan | 991.44 mi (1,595.57 km) |
| Penafiel to Opmeer | 1,006.74 mi (1,620.19 km) |
| Penafiel to Oss | 978.30 mi (1,574.42 km) |
| Penafiel to Oud-Beijerland | 946.55 mi (1,523.32 km) |
| Penafiel to Oudenbosch | 939.11 mi (1,511.35 km) |
