| Gateway to Oerlinghausen | 4,809.33 mi (7,739.87 km) |
| Gateway to Oestrich-Winkel | 4,822.63 mi (7,761.27 km) |
| Gateway to Offenburg | 4,852.31 mi (7,809.05 km) |
| Gateway to Oftersheim | 4,860.90 mi (7,822.86 km) |
| Gateway to Ohrdruf | 4,918.63 mi (7,915.78 km) |
| Gateway to Ohringen | 4,903.76 mi (7,891.83 km) |
| Gateway to Olbernhau | 5,029.16 mi (8,093.66 km) |
| Gateway to Olching | 5,005.06 mi (8,054.86 km) |
| Gateway to Oldenburg | 4,767.29 mi (7,672.22 km) |
| Gateway to Oldenburg in Holstein | 4,847.45 mi (7,801.21 km) |
| Gateway to Olfen | 4,761.99 mi (7,663.69 km) |
| Gateway to Olpe | 4,794.62 mi (7,716.19 km) |
| Gateway to Olsberg | 4,814.62 mi (7,748.39 km) |
| Gateway to Oranienburg | 4,974.04 mi (8,004.94 km) |
| Gateway to Ortenberg | 4,859.47 mi (7,820.56 km) |
