| Forest Hills to Oerlinghausen | 4,126.96 mi (6,641.70 km) |
| Forest Hills to Oestrich-Winkel | 4,175.73 mi (6,720.18 km) |
| Forest Hills to Offenburg | 4,231.25 mi (6,809.53 km) |
| Forest Hills to Oftersheim | 4,221.41 mi (6,793.70 km) |
| Forest Hills to Ohrdruf | 4,244.55 mi (6,830.94 km) |
| Forest Hills to Ohringen | 4,262.24 mi (6,859.42 km) |
| Forest Hills to Olbernhau | 4,344.21 mi (6,991.33 km) |
| Forest Hills to Olching | 4,369.70 mi (7,032.35 km) |
| Forest Hills to Oldenburg | 4,067.85 mi (6,546.57 km) |
| Forest Hills to Oldenburg in Holstein | 4,118.13 mi (6,627.48 km) |
| Forest Hills to Olfen | 4,089.64 mi (6,581.65 km) |
| Forest Hills to Olpe | 4,131.73 mi (6,649.37 km) |
| Forest Hills to Olsberg | 4,143.16 mi (6,667.77 km) |
| Forest Hills to Oranienburg | 4,257.73 mi (6,852.16 km) |
| Forest Hills to Ortenberg | 4,201.43 mi (6,761.54 km) |
