| Clayton to Olivares | 1,149.46 mi (1,849.87 km) |
| Clayton to Olivenza | 1,072.47 mi (1,725.97 km) |
| Clayton to Olot | 825.41 mi (1,328.37 km) |
| Clayton to Onate | 743.17 mi (1,196.02 km) |
| Clayton to Onda | 957.58 mi (1,541.07 km) |
| Clayton to Onteniente | 1,035.19 mi (1,665.97 km) |
| Clayton to Orihuela | 1,085.29 mi (1,746.61 km) |
| Clayton to Osuna | 1,154.11 mi (1,857.36 km) |
| Clayton to Ourense | 837.96 mi (1,348.56 km) |
| Clayton to Oviedo | 742.99 mi (1,195.73 km) |
| Clayton to Paiporta | 993.94 mi (1,599.59 km) |
| Clayton to Pajara | 1,863.96 mi (2,999.75 km) |
| Clayton to Palafolls | 862.92 mi (1,388.74 km) |
| Clayton to Palafrugell | 851.09 mi (1,369.69 km) |
| Clayton to Palamos | 855.47 mi (1,376.75 km) |
