| Dillenburg to Oestrich-Winkel | 52.18 mi (83.98 km) |
| Dillenburg to Offenburg | 157.39 mi (253.29 km) |
| Dillenburg to Oftersheim | 95.10 mi (153.05 km) |
| Dillenburg to Ohrdruf | 107.21 mi (172.53 km) |
| Dillenburg to Ohringen | 118.94 mi (191.41 km) |
| Dillenburg to Olbernhau | 221.00 mi (355.67 km) |
| Dillenburg to Olching | 221.75 mi (356.87 km) |
| Dillenburg to Oldenburg | 166.58 mi (268.09 km) |
| Dillenburg to Oldenburg in Holstein | 269.55 mi (433.79 km) |
| Dillenburg to Olfen | 78.31 mi (126.03 km) |
| Dillenburg to Olpe | 27.72 mi (44.61 km) |
| Dillenburg to Olsberg | 43.49 mi (69.98 km) |
| Dillenburg to Oranienburg | 253.71 mi (408.30 km) |
| Dillenburg to Ortenberg | 42.77 mi (68.83 km) |
| Dillenburg to Oschatz | 213.26 mi (343.21 km) |
