| Fern Down to Oerlinghausen | 462.13 mi (743.72 km) |
| Fern Down to Oestrich-Winkel | 439.21 mi (706.83 km) |
| Fern Down to Offenburg | 468.40 mi (753.81 km) |
| Fern Down to Oftersheim | 474.86 mi (764.21 km) |
| Fern Down to Ohrdruf | 550.77 mi (886.37 km) |
| Fern Down to Ohringen | 517.76 mi (833.25 km) |
| Fern Down to Olbernhau | 664.99 mi (1,070.20 km) |
| Fern Down to Olching | 618.84 mi (995.93 km) |
| Fern Down to Oldenburg | 459.17 mi (738.97 km) |
| Fern Down to Oldenburg in Holstein | 587.56 mi (945.59 km) |
| Fern Down to Olfen | 405.93 mi (653.28 km) |
| Fern Down to Olpe | 423.94 mi (682.27 km) |
| Fern Down to Olsberg | 451.87 mi (727.21 km) |
| Fern Down to Oranienburg | 659.51 mi (1,061.37 km) |
| Fern Down to Ortenberg | 481.21 mi (774.43 km) |
