| Erkrath to Octeville | 392.26 mi (631.29 km) |
| Erkrath to Oignies | 178.81 mi (287.76 km) |
| Erkrath to Oissel | 288.00 mi (463.49 km) |
| Erkrath to Olivet | 323.01 mi (519.83 km) |
| Erkrath to Ollioules | 560.81 mi (902.54 km) |
| Erkrath to Olonne-sur-Mer | 510.03 mi (820.82 km) |
| Erkrath to Oloron-Sainte-Marie | 656.82 mi (1,057.05 km) |
| Erkrath to Onet Village | 514.33 mi (827.74 km) |
| Erkrath to Onnaing | 155.89 mi (250.89 km) |
| Erkrath to Orange | 499.21 mi (803.40 km) |
| Erkrath to Orchies | 168.26 mi (270.78 km) |
| Erkrath to Orleans | 320.77 mi (516.24 km) |
| Erkrath to Orly | 263.96 mi (424.80 km) |
| Erkrath to Ormesson-sur-Marne | 257.11 mi (413.78 km) |
| Erkrath to Orsay | 273.04 mi (439.42 km) |
