| Gross-Umstadt to Oestrich-Winkel | 42.52 mi (68.42 km) |
| Gross-Umstadt to Offenburg | 106.76 mi (171.81 km) |
| Gross-Umstadt to Oftersheim | 37.66 mi (60.61 km) |
| Gross-Umstadt to Ohrdruf | 103.47 mi (166.52 km) |
| Gross-Umstadt to Ohringen | 52.61 mi (84.67 km) |
| Gross-Umstadt to Olbernhau | 202.00 mi (325.09 km) |
| Gross-Umstadt to Olching | 157.84 mi (254.02 km) |
| Gross-Umstadt to Oldenburg | 228.53 mi (367.79 km) |
| Gross-Umstadt to Oldenburg in Holstein | 317.27 mi (510.60 km) |
| Gross-Umstadt to Olfen | 144.64 mi (232.77 km) |
| Gross-Umstadt to Olpe | 93.04 mi (149.73 km) |
| Gross-Umstadt to Olsberg | 104.37 mi (167.96 km) |
| Gross-Umstadt to Oranienburg | 272.59 mi (438.69 km) |
| Gross-Umstadt to Ortenberg | 34.22 mi (55.08 km) |
| Gross-Umstadt to Oschatz | 208.14 mi (334.97 km) |
