| Aerzen to Oestrich-Winkel | 151.89 mi (244.44 km) |
| Aerzen to Offenburg | 254.42 mi (409.46 km) |
| Aerzen to Oftersheim | 187.47 mi (301.70 km) |
| Aerzen to Ohrdruf | 105.47 mi (169.74 km) |
| Aerzen to Ohringen | 197.16 mi (317.30 km) |
| Aerzen to Olbernhau | 199.85 mi (321.63 km) |
| Aerzen to Olching | 281.07 mi (452.33 km) |
| Aerzen to Oldenburg | 87.51 mi (140.83 km) |
| Aerzen to Oldenburg in Holstein | 169.32 mi (272.50 km) |
| Aerzen to Olfen | 83.43 mi (134.27 km) |
| Aerzen to Olpe | 94.19 mi (151.59 km) |
| Aerzen to Olsberg | 58.77 mi (94.58 km) |
| Aerzen to Oranienburg | 174.40 mi (280.66 km) |
| Aerzen to Ortenberg | 117.38 mi (188.90 km) |
| Aerzen to Oschatz | 172.60 mi (277.77 km) |
