| Clacton-on-Sea to Nuth | 213.13 mi (343.00 km) |
| Clacton-on-Sea to Oegstgeest | 143.86 mi (231.52 km) |
| Clacton-on-Sea to Oirschot | 179.22 mi (288.43 km) |
| Clacton-on-Sea to Oisterwijk | 174.24 mi (280.41 km) |
| Clacton-on-Sea to Oldebroek | 206.71 mi (332.67 km) |
| Clacton-on-Sea to Oldenzaal | 248.49 mi (399.90 km) |
| Clacton-on-Sea to Ommen | 228.93 mi (368.43 km) |
| Clacton-on-Sea to Oosterend | 223.65 mi (359.93 km) |
| Clacton-on-Sea to Oosterhout | 159.18 mi (256.17 km) |
| Clacton-on-Sea to Oosterwolde | 232.17 mi (373.64 km) |
| Clacton-on-Sea to Oostzaan | 164.65 mi (264.97 km) |
| Clacton-on-Sea to Opmeer | 172.71 mi (277.95 km) |
| Clacton-on-Sea to Oss | 186.83 mi (300.67 km) |
| Clacton-on-Sea to Oud-Beijerland | 139.04 mi (223.76 km) |
| Clacton-on-Sea to Oudenbosch | 145.36 mi (233.93 km) |
