| Darmstadt to Oestrich-Winkel | 30.34 mi (48.83 km) |
| Darmstadt to Offenburg | 102.40 mi (164.80 km) |
| Darmstadt to Oftersheim | 34.79 mi (55.99 km) |
| Darmstadt to Ohrdruf | 113.00 mi (181.86 km) |
| Darmstadt to Ohringen | 60.00 mi (96.56 km) |
| Darmstadt to Olbernhau | 213.83 mi (344.12 km) |
| Darmstadt to Olching | 167.04 mi (268.83 km) |
| Darmstadt to Oldenburg | 226.84 mi (365.06 km) |
| Darmstadt to Oldenburg in Holstein | 320.21 mi (515.33 km) |
| Darmstadt to Olfen | 138.98 mi (223.66 km) |
| Darmstadt to Olpe | 86.91 mi (139.87 km) |
| Darmstadt to Olsberg | 102.38 mi (164.76 km) |
| Darmstadt to Oranienburg | 280.70 mi (451.74 km) |
| Darmstadt to Ortenberg | 37.87 mi (60.95 km) |
| Darmstadt to Oschatz | 218.86 mi (352.22 km) |
