| Grafton to Oerlinghausen | 4,196.80 mi (6,754.10 km) |
| Grafton to Oestrich-Winkel | 4,249.48 mi (6,838.87 km) |
| Grafton to Offenburg | 4,307.62 mi (6,932.44 km) |
| Grafton to Oftersheim | 4,295.79 mi (6,913.40 km) |
| Grafton to Ohrdruf | 4,314.86 mi (6,944.10 km) |
| Grafton to Ohringen | 4,336.22 mi (6,978.48 km) |
| Grafton to Olbernhau | 4,412.80 mi (7,101.71 km) |
| Grafton to Olching | 4,443.91 mi (7,151.78 km) |
| Grafton to Oldenburg | 4,135.90 mi (6,656.08 km) |
| Grafton to Oldenburg in Holstein | 4,182.19 mi (6,730.58 km) |
| Grafton to Olfen | 4,160.84 mi (6,696.23 km) |
| Grafton to Olpe | 4,203.84 mi (6,765.43 km) |
| Grafton to Olsberg | 4,214.22 mi (6,782.14 km) |
| Grafton to Oranienburg | 4,322.84 mi (6,956.93 km) |
| Grafton to Ortenberg | 4,273.79 mi (6,878.00 km) |
