| Pirot to Olivenza | 1,571.65 mi (2,529.32 km) |
| Pirot to Olot | 1,020.71 mi (1,642.67 km) |
| Pirot to Onate | 1,256.78 mi (2,022.60 km) |
| Pirot to Onda | 1,197.80 mi (1,927.67 km) |
| Pirot to Onteniente | 1,241.65 mi (1,998.25 km) |
| Pirot to Orihuela | 1,278.02 mi (2,056.77 km) |
| Pirot to Osuna | 1,509.58 mi (2,429.44 km) |
| Pirot to Ourense | 1,537.49 mi (2,474.35 km) |
| Pirot to Oviedo | 1,423.71 mi (2,291.25 km) |
| Pirot to Paiporta | 1,217.51 mi (1,959.39 km) |
| Pirot to Pajara | 2,272.97 mi (3,658.00 km) |
| Pirot to Palafolls | 1,014.60 mi (1,632.84 km) |
| Pirot to Palafrugell | 990.26 mi (1,593.67 km) |
| Pirot to Palamos | 992.98 mi (1,598.04 km) |
| Pirot to Palencia | 1,375.76 mi (2,214.08 km) |
