| Great Baddow to Oerlinghausen | 348.55 mi (560.94 km) |
| Great Baddow to Oestrich-Winkel | 347.51 mi (559.27 km) |
| Great Baddow to Offenburg | 398.26 mi (640.94 km) |
| Great Baddow to Oftersheim | 389.74 mi (627.23 km) |
| Great Baddow to Ohrdruf | 445.90 mi (717.60 km) |
| Great Baddow to Ohringen | 431.79 mi (694.89 km) |
| Great Baddow to Olbernhau | 559.39 mi (900.24 km) |
| Great Baddow to Olching | 537.78 mi (865.47 km) |
| Great Baddow to Oldenburg | 339.07 mi (545.68 km) |
| Great Baddow to Oldenburg in Holstein | 466.21 mi (750.30 km) |
| Great Baddow to Olfen | 294.24 mi (473.53 km) |
| Great Baddow to Olpe | 319.59 mi (514.33 km) |
| Great Baddow to Olsberg | 343.59 mi (552.95 km) |
| Great Baddow to Oranienburg | 542.64 mi (873.29 km) |
| Great Baddow to Ortenberg | 382.90 mi (616.22 km) |
