| Casier to Olivenza | 1,100.07 mi (1,770.39 km) |
| Casier to Olot | 543.42 mi (874.54 km) |
| Casier to Onate | 748.17 mi (1,204.06 km) |
| Casier to Onda | 747.05 mi (1,202.27 km) |
| Casier to Onteniente | 809.87 mi (1,303.36 km) |
| Casier to Orihuela | 857.03 mi (1,379.26 km) |
| Casier to Osuna | 1,069.00 mi (1,720.39 km) |
| Casier to Ourense | 1,025.12 mi (1,649.76 km) |
| Casier to Oviedo | 905.97 mi (1,458.02 km) |
| Casier to Paiporta | 775.77 mi (1,248.47 km) |
| Casier to Pajara | 1,869.04 mi (3,007.92 km) |
| Casier to Palafolls | 550.37 mi (885.73 km) |
| Casier to Palafrugell | 523.21 mi (842.03 km) |
| Casier to Palamos | 527.37 mi (848.72 km) |
| Casier to Palencia | 873.84 mi (1,406.31 km) |
