| Clacton-on-Sea to Oerlinghausen | 320.88 mi (516.40 km) |
| Clacton-on-Sea to Oestrich-Winkel | 323.18 mi (520.11 km) |
| Clacton-on-Sea to Offenburg | 378.11 mi (608.52 km) |
| Clacton-on-Sea to Oftersheim | 366.51 mi (589.84 km) |
| Clacton-on-Sea to Ohrdruf | 419.07 mi (674.44 km) |
| Clacton-on-Sea to Ohringen | 408.21 mi (656.94 km) |
| Clacton-on-Sea to Olbernhau | 532.37 mi (856.77 km) |
| Clacton-on-Sea to Olching | 514.79 mi (828.47 km) |
| Clacton-on-Sea to Oldenburg | 311.68 mi (501.61 km) |
| Clacton-on-Sea to Oldenburg in Holstein | 439.56 mi (707.41 km) |
| Clacton-on-Sea to Olfen | 266.76 mi (429.31 km) |
| Clacton-on-Sea to Olpe | 293.07 mi (471.65 km) |
| Clacton-on-Sea to Olsberg | 316.45 mi (509.28 km) |
| Clacton-on-Sea to Oranienburg | 514.88 mi (828.61 km) |
| Clacton-on-Sea to Ortenberg | 357.22 mi (574.88 km) |
