| Clacton-on-Sea to Opole | 728.85 mi (1,172.97 km) |
| Clacton-on-Sea to Orzesze | 772.35 mi (1,242.98 km) |
| Clacton-on-Sea to Osowa | 739.20 mi (1,189.62 km) |
| Clacton-on-Sea to Ostroda | 795.73 mi (1,280.60 km) |
| Clacton-on-Sea to Ostroleka | 861.85 mi (1,387.01 km) |
| Clacton-on-Sea to Ostrow Mazowiecka | 876.69 mi (1,410.90 km) |
| Clacton-on-Sea to Ostrow Wielkopolski | 712.07 mi (1,145.96 km) |
| Clacton-on-Sea to Ostrowiec Swietokrzyski | 872.98 mi (1,404.92 km) |
| Clacton-on-Sea to Ostrzeszow | 719.28 mi (1,157.57 km) |
| Clacton-on-Sea to Oswiecim | 794.55 mi (1,278.71 km) |
| Clacton-on-Sea to Otwock | 854.33 mi (1,374.91 km) |
| Clacton-on-Sea to Ozarow Mazowiecki | 833.93 mi (1,342.08 km) |
| Clacton-on-Sea to Ozimek | 740.71 mi (1,192.06 km) |
| Clacton-on-Sea to Ozorkow | 771.71 mi (1,241.94 km) |
| Clacton-on-Sea to Pabianice | 778.64 mi (1,253.11 km) |
