| Forest Hill to Oerlinghausen | 5,083.81 mi (8,181.61 km) |
| Forest Hill to Oestrich-Winkel | 5,132.26 mi (8,259.57 km) |
| Forest Hill to Offenburg | 5,186.84 mi (8,347.41 km) |
| Forest Hill to Oftersheim | 5,177.76 mi (8,332.80 km) |
| Forest Hill to Ohrdruf | 5,201.43 mi (8,370.90 km) |
| Forest Hill to Ohringen | 5,218.71 mi (8,398.70 km) |
| Forest Hill to Olbernhau | 5,300.93 mi (8,531.02 km) |
| Forest Hill to Olching | 5,326.08 mi (8,571.50 km) |
| Forest Hill to Oldenburg | 5,024.44 mi (8,086.06 km) |
| Forest Hill to Oldenburg in Holstein | 5,073.31 mi (8,164.70 km) |
| Forest Hill to Olfen | 5,046.53 mi (8,121.60 km) |
| Forest Hill to Olpe | 5,088.55 mi (8,189.22 km) |
| Forest Hill to Olsberg | 5,100.04 mi (8,207.73 km) |
| Forest Hill to Oranienburg | 5,213.41 mi (8,390.18 km) |
| Forest Hill to Ortenberg | 5,158.21 mi (8,301.34 km) |
