| Herdecke to Olivenza | 1,124.95 mi (1,810.43 km) |
| Herdecke to Olot | 678.08 mi (1,091.27 km) |
| Herdecke to Onate | 738.83 mi (1,189.03 km) |
| Herdecke to Onda | 872.09 mi (1,403.50 km) |
| Herdecke to Onteniente | 952.01 mi (1,532.12 km) |
| Herdecke to Orihuela | 1,006.11 mi (1,619.17 km) |
| Herdecke to Osuna | 1,154.84 mi (1,858.54 km) |
| Herdecke to Ourense | 952.79 mi (1,533.37 km) |
| Herdecke to Oviedo | 831.09 mi (1,337.50 km) |
| Herdecke to Paiporta | 909.40 mi (1,463.53 km) |
| Herdecke to Pajara | 1,943.91 mi (3,128.43 km) |
| Herdecke to Palafolls | 707.84 mi (1,139.16 km) |
| Herdecke to Palafrugell | 685.46 mi (1,103.14 km) |
| Herdecke to Palamos | 690.70 mi (1,111.57 km) |
| Herdecke to Palencia | 859.06 mi (1,382.53 km) |
