| Clacton-on-Sea to Olivares | 1,054.78 mi (1,697.50 km) |
| Clacton-on-Sea to Olivenza | 988.93 mi (1,591.52 km) |
| Clacton-on-Sea to Olot | 666.94 mi (1,073.34 km) |
| Clacton-on-Sea to Onate | 627.46 mi (1,009.80 km) |
| Clacton-on-Sea to Onda | 820.09 mi (1,319.81 km) |
| Clacton-on-Sea to Onteniente | 900.08 mi (1,448.54 km) |
| Clacton-on-Sea to Orihuela | 952.42 mi (1,532.77 km) |
| Clacton-on-Sea to Osuna | 1,050.94 mi (1,691.33 km) |
| Clacton-on-Sea to Ourense | 777.54 mi (1,251.33 km) |
| Clacton-on-Sea to Oviedo | 666.80 mi (1,073.11 km) |
| Clacton-on-Sea to Paiporta | 857.55 mi (1,380.10 km) |
| Clacton-on-Sea to Pajara | 1,800.81 mi (2,898.13 km) |
| Clacton-on-Sea to Palafolls | 703.47 mi (1,132.13 km) |
| Clacton-on-Sea to Palafrugell | 688.81 mi (1,108.53 km) |
| Clacton-on-Sea to Palamos | 693.50 mi (1,116.08 km) |
