| Santo Tirso to Nuth | 951.16 mi (1,530.74 km) |
| Santo Tirso to Oegstgeest | 964.88 mi (1,552.83 km) |
| Santo Tirso to Oirschot | 957.86 mi (1,541.53 km) |
| Santo Tirso to Oisterwijk | 958.52 mi (1,542.59 km) |
| Santo Tirso to Oldebroek | 1,021.00 mi (1,643.14 km) |
| Santo Tirso to Oldenzaal | 1,047.42 mi (1,685.65 km) |
| Santo Tirso to Ommen | 1,040.13 mi (1,673.93 km) |
| Santo Tirso to Oosterend | 1,052.43 mi (1,693.72 km) |
| Santo Tirso to Oosterhout | 950.52 mi (1,529.72 km) |
| Santo Tirso to Oosterwolde | 1,058.54 mi (1,703.55 km) |
| Santo Tirso to Oostzaan | 989.54 mi (1,592.51 km) |
| Santo Tirso to Opmeer | 1,004.70 mi (1,616.90 km) |
| Santo Tirso to Oss | 977.08 mi (1,572.46 km) |
| Santo Tirso to Oud-Beijerland | 944.85 mi (1,520.59 km) |
| Santo Tirso to Oudenbosch | 937.62 mi (1,508.95 km) |
