| Erfurt to Obernburg am Main | 114.79 mi (184.74 km) |
| Erfurt to Obernkirchen | 120.86 mi (194.51 km) |
| Erfurt to Oberschleissheim | 190.35 mi (306.35 km) |
| Erfurt to Oberstdorf | 249.24 mi (401.12 km) |
| Erfurt to Obertraubling | 148.21 mi (238.53 km) |
| Erfurt to Obertshausen | 115.53 mi (185.93 km) |
| Erfurt to Oberursel | 120.46 mi (193.86 km) |
| Erfurt to Ochsenfurt | 101.51 mi (163.37 km) |
| Erfurt to Ochsenhausen | 206.94 mi (333.03 km) |
| Erfurt to Ochtrup | 185.28 mi (298.18 km) |
| Erfurt to Odenthal | 170.29 mi (274.05 km) |
| Erfurt to Oelde | 137.43 mi (221.17 km) |
| Erfurt to Oelsnitz | 63.19 mi (101.69 km) |
| Erfurt to Oer-Erkenschwick | 169.56 mi (272.88 km) |
| Erfurt to Oerlinghausen | 122.42 mi (197.02 km) |
