| Pirot to Oberkirch | 789.06 mi (1,269.87 km) |
| Pirot to Obernburg am Main | 787.03 mi (1,266.60 km) |
| Pirot to Obernkirchen | 885.32 mi (1,424.79 km) |
| Pirot to Oberschleissheim | 636.83 mi (1,024.87 km) |
| Pirot to Oberstdorf | 665.66 mi (1,071.27 km) |
| Pirot to Obertraubling | 640.00 mi (1,029.98 km) |
| Pirot to Obertshausen | 806.83 mi (1,298.47 km) |
| Pirot to Oberursel | 821.42 mi (1,321.96 km) |
| Pirot to Ochsenfurt | 744.96 mi (1,198.89 km) |
| Pirot to Ochsenhausen | 697.77 mi (1,122.95 km) |
| Pirot to Ochtrup | 947.40 mi (1,524.70 km) |
| Pirot to Odenthal | 905.82 mi (1,457.78 km) |
| Pirot to Oelde | 899.25 mi (1,447.21 km) |
| Pirot to Oelsnitz | 702.22 mi (1,130.12 km) |
| Pirot to Oer-Erkenschwick | 923.33 mi (1,485.95 km) |
