| Greentree to Oerlinghausen | 3,876.41 mi (6,238.48 km) |
| Greentree to Oestrich-Winkel | 3,904.44 mi (6,283.59 km) |
| Greentree to Offenburg | 3,945.67 mi (6,349.94 km) |
| Greentree to Oftersheim | 3,946.23 mi (6,350.84 km) |
| Greentree to Ohrdruf | 3,989.93 mi (6,421.17 km) |
| Greentree to Ohringen | 3,988.58 mi (6,419.01 km) |
| Greentree to Olbernhau | 4,096.96 mi (6,593.41 km) |
| Greentree to Olching | 4,093.43 mi (6,587.74 km) |
| Greentree to Oldenburg | 3,827.39 mi (6,159.59 km) |
| Greentree to Oldenburg in Holstein | 3,897.11 mi (6,271.80 km) |
| Greentree to Olfen | 3,832.71 mi (6,168.15 km) |
| Greentree to Olpe | 3,869.48 mi (6,227.32 km) |
| Greentree to Olsberg | 3,886.13 mi (6,254.13 km) |
| Greentree to Oranienburg | 4,029.35 mi (6,484.60 km) |
| Greentree to Ortenberg | 3,936.89 mi (6,335.81 km) |
