| Pirot to Nuth | 948.60 mi (1,526.63 km) |
| Pirot to Oegstgeest | 1,044.06 mi (1,680.25 km) |
| Pirot to Oirschot | 989.98 mi (1,593.22 km) |
| Pirot to Oisterwijk | 996.52 mi (1,603.75 km) |
| Pirot to Oldebroek | 1,001.95 mi (1,612.48 km) |
| Pirot to Oldenzaal | 960.71 mi (1,546.11 km) |
| Pirot to Ommen | 986.47 mi (1,587.57 km) |
| Pirot to Oosterend | 1,017.74 mi (1,637.90 km) |
| Pirot to Oosterhout | 1,011.42 mi (1,627.72 km) |
| Pirot to Oosterwolde | 1,009.60 mi (1,624.79 km) |
| Pirot to Oostzaan | 1,037.58 mi (1,669.83 km) |
| Pirot to Opmeer | 1,044.86 mi (1,681.53 km) |
| Pirot to Oss | 990.97 mi (1,594.82 km) |
| Pirot to Oud-Beijerland | 1,034.32 mi (1,664.58 km) |
| Pirot to Oudenbosch | 1,022.27 mi (1,645.19 km) |
