| Friedrichsdorf to Oestrich-Winkel | 33.39 mi (53.73 km) |
| Friedrichsdorf to Offenburg | 127.62 mi (205.39 km) |
| Friedrichsdorf to Oftersheim | 61.20 mi (98.49 km) |
| Friedrichsdorf to Ohrdruf | 100.05 mi (161.02 km) |
| Friedrichsdorf to Ohringen | 82.44 mi (132.67 km) |
| Friedrichsdorf to Olbernhau | 208.36 mi (335.32 km) |
| Friedrichsdorf to Olching | 186.42 mi (300.02 km) |
| Friedrichsdorf to Oldenburg | 200.39 mi (322.50 km) |
| Friedrichsdorf to Oldenburg in Holstein | 295.06 mi (474.85 km) |
| Friedrichsdorf to Olfen | 114.79 mi (184.74 km) |
| Friedrichsdorf to Olpe | 63.36 mi (101.96 km) |
| Friedrichsdorf to Olsberg | 75.92 mi (122.19 km) |
| Friedrichsdorf to Oranienburg | 262.39 mi (422.28 km) |
| Friedrichsdorf to Ortenberg | 19.60 mi (31.55 km) |
| Friedrichsdorf to Oschatz | 208.06 mi (334.84 km) |
