| Frondenberg to Oestrich-Winkel | 102.21 mi (164.50 km) |
| Frondenberg to Offenburg | 207.77 mi (334.38 km) |
| Frondenberg to Oftersheim | 149.59 mi (240.74 km) |
| Frondenberg to Ohrdruf | 136.06 mi (218.96 km) |
| Frondenberg to Ohringen | 174.60 mi (280.99 km) |
| Frondenberg to Olbernhau | 247.98 mi (399.08 km) |
| Frondenberg to Olching | 275.87 mi (443.98 km) |
| Frondenberg to Oldenburg | 117.06 mi (188.40 km) |
| Frondenberg to Oldenburg in Holstein | 234.63 mi (377.60 km) |
| Frondenberg to Olfen | 23.57 mi (37.94 km) |
| Frondenberg to Olpe | 31.59 mi (50.83 km) |
| Frondenberg to Olsberg | 32.05 mi (51.58 km) |
| Frondenberg to Oranienburg | 248.40 mi (399.76 km) |
| Frondenberg to Ortenberg | 95.40 mi (153.54 km) |
| Frondenberg to Oschatz | 230.57 mi (371.07 km) |
