| Clacton-on-Sea to Octeville | 193.01 mi (310.61 km) |
| Clacton-on-Sea to Oignies | 121.53 mi (195.58 km) |
| Clacton-on-Sea to Oissel | 169.29 mi (272.44 km) |
| Clacton-on-Sea to Olivet | 273.47 mi (440.10 km) |
| Clacton-on-Sea to Ollioules | 636.54 mi (1,024.41 km) |
| Clacton-on-Sea to Olonne-sur-Mer | 386.25 mi (621.61 km) |
| Clacton-on-Sea to Oloron-Sainte-Marie | 599.60 mi (964.96 km) |
| Clacton-on-Sea to Onet Village | 517.41 mi (832.69 km) |
| Clacton-on-Sea to Onnaing | 143.99 mi (231.73 km) |
| Clacton-on-Sea to Orange | 555.12 mi (893.39 km) |
| Clacton-on-Sea to Orchies | 128.67 mi (207.08 km) |
| Clacton-on-Sea to Orleans | 270.86 mi (435.91 km) |
| Clacton-on-Sea to Orly | 217.66 mi (350.30 km) |
| Clacton-on-Sea to Ormesson-sur-Marne | 216.59 mi (348.57 km) |
| Clacton-on-Sea to Orsay | 218.65 mi (351.88 km) |
