| Cities | Distance |
|---|---|
| Herdecke to Oria | 896.61 mi (1,442.95 km) |
| Herdecke to Oristano | 796.11 mi (1,281.22 km) |
| Herdecke to Orta Nova | 798.70 mi (1,285.39 km) |
| Herdecke to Orte | 660.02 mi (1,062.19 km) |
| Herdecke to Ortona | 705.83 mi (1,135.93 km) |
| Herdecke to Orvieto | 638.63 mi (1,027.78 km) |
| Herdecke to Orzinuovi | 430.06 mi (692.12 km) |
| Herdecke to Osimo | 615.23 mi (990.12 km) |
| Herdecke to Ospitaletto | 421.47 mi (678.29 km) |
| Herdecke to Ostuni | 881.31 mi (1,418.32 km) |
| Herdecke to Ottaviano | 802.31 mi (1,291.19 km) |
| Herdecke to Ovada | 470.46 mi (757.13 km) |
| Herdecke to Ozieri | 750.99 mi (1,208.61 km) |
| Herdecke to Paceco | 959.86 mi (1,544.75 km) |
| Herdecke to Pachino | 1,082.14 mi (1,741.53 km) |