| Mackworth to Oerlinghausen | 434.43 mi (699.14 km) |
| Mackworth to Oestrich-Winkel | 457.18 mi (735.76 km) |
| Mackworth to Offenburg | 515.84 mi (830.16 km) |
| Mackworth to Oftersheim | 502.21 mi (808.23 km) |
| Mackworth to Ohrdruf | 542.34 mi (872.81 km) |
| Mackworth to Ohringen | 543.27 mi (874.31 km) |
| Mackworth to Olbernhau | 653.04 mi (1,050.97 km) |
| Mackworth to Olching | 650.53 mi (1,046.93 km) |
| Mackworth to Oldenburg | 405.09 mi (651.94 km) |
| Mackworth to Oldenburg in Holstein | 517.13 mi (832.25 km) |
| Mackworth to Olfen | 385.63 mi (620.62 km) |
| Mackworth to Olpe | 419.78 mi (675.56 km) |
| Mackworth to Olsberg | 438.29 mi (705.36 km) |
| Mackworth to Oranienburg | 615.62 mi (990.74 km) |
| Mackworth to Ortenberg | 487.14 mi (783.97 km) |
