| Cangas de Narcea to Nuth | 790.83 mi (1,272.72 km) |
| Cangas de Narcea to Oegstgeest | 804.30 mi (1,294.40 km) |
| Cangas de Narcea to Oirschot | 797.12 mi (1,282.84 km) |
| Cangas de Narcea to Oisterwijk | 797.76 mi (1,283.87 km) |
| Cangas de Narcea to Oldebroek | 860.25 mi (1,384.44 km) |
| Cangas de Narcea to Oldenzaal | 886.69 mi (1,426.99 km) |
| Cangas de Narcea to Ommen | 879.36 mi (1,415.20 km) |
| Cangas de Narcea to Oosterend | 891.79 mi (1,435.20 km) |
| Cangas de Narcea to Oosterhout | 789.76 mi (1,270.99 km) |
| Cangas de Narcea to Oosterwolde | 897.85 mi (1,444.95 km) |
| Cangas de Narcea to Oostzaan | 828.95 mi (1,334.07 km) |
| Cangas de Narcea to Opmeer | 844.21 mi (1,358.63 km) |
| Cangas de Narcea to Oss | 816.33 mi (1,313.75 km) |
| Cangas de Narcea to Oud-Beijerland | 784.15 mi (1,261.97 km) |
| Cangas de Narcea to Oudenbosch | 776.86 mi (1,250.24 km) |
