| Most to Olivenza | 1,299.07 mi (2,090.65 km) |
| Most to Olot | 781.45 mi (1,257.62 km) |
| Most to Onate | 915.41 mi (1,473.20 km) |
| Most to Onda | 990.71 mi (1,594.39 km) |
| Most to Onteniente | 1,064.62 mi (1,713.34 km) |
| Most to Orihuela | 1,116.70 mi (1,797.16 km) |
| Most to Osuna | 1,301.24 mi (2,094.14 km) |
| Most to Ourense | 1,163.17 mi (1,871.94 km) |
| Most to Oviedo | 1,038.88 mi (1,671.92 km) |
| Most to Paiporta | 1,024.99 mi (1,649.56 km) |
| Most to Pajara | 2,105.53 mi (3,388.53 km) |
| Most to Palafolls | 801.24 mi (1,289.46 km) |
| Most to Palafrugell | 774.80 mi (1,246.92 km) |
| Most to Palamos | 779.83 mi (1,255.01 km) |
| Most to Palencia | 1,043.08 mi (1,678.67 km) |
