| Erkrath to Oestrich-Winkel | 97.03 mi (156.15 km) |
| Erkrath to Offenburg | 195.83 mi (315.16 km) |
| Erkrath to Oftersheim | 147.74 mi (237.77 km) |
| Erkrath to Ohrdruf | 168.14 mi (270.60 km) |
| Erkrath to Ohringen | 180.59 mi (290.63 km) |
| Erkrath to Olbernhau | 281.97 mi (453.78 km) |
| Erkrath to Olching | 286.84 mi (461.62 km) |
| Erkrath to Oldenburg | 143.62 mi (231.13 km) |
| Erkrath to Oldenburg in Holstein | 269.55 mi (433.80 km) |
| Erkrath to Olfen | 39.57 mi (63.69 km) |
| Erkrath to Olpe | 42.33 mi (68.13 km) |
| Erkrath to Olsberg | 68.34 mi (109.98 km) |
| Erkrath to Oranienburg | 288.92 mi (464.96 km) |
| Erkrath to Ortenberg | 111.08 mi (178.76 km) |
| Erkrath to Oschatz | 267.71 mi (430.84 km) |
