| Ferndale to Oerlinghausen | 4,065.33 mi (6,542.52 km) |
| Ferndale to Oestrich-Winkel | 4,110.00 mi (6,614.41 km) |
| Ferndale to Offenburg | 4,162.74 mi (6,699.28 km) |
| Ferndale to Oftersheim | 4,154.98 mi (6,686.79 km) |
| Ferndale to Ohrdruf | 4,182.33 mi (6,730.81 km) |
| Ferndale to Ohringen | 4,196.20 mi (6,753.13 km) |
| Ferndale to Olbernhau | 4,283.68 mi (6,893.91 km) |
| Ferndale to Olching | 4,303.32 mi (6,925.53 km) |
| Ferndale to Oldenburg | 4,008.15 mi (6,450.49 km) |
| Ferndale to Oldenburg in Holstein | 4,062.49 mi (6,537.95 km) |
| Ferndale to Olfen | 4,026.65 mi (6,480.27 km) |
| Ferndale to Olpe | 4,067.74 mi (6,546.40 km) |
| Ferndale to Olsberg | 4,080.25 mi (6,566.53 km) |
| Ferndale to Oranienburg | 4,200.88 mi (6,760.66 km) |
| Ferndale to Ortenberg | 4,137.11 mi (6,658.04 km) |
