| Hard to Olivenza | 1,039.37 mi (1,672.70 km) |
| Hard to Olot | 508.43 mi (818.24 km) |
| Hard to Onate | 663.40 mi (1,067.63 km) |
| Hard to Onda | 718.21 mi (1,155.85 km) |
| Hard to Onteniente | 791.05 mi (1,273.08 km) |
| Hard to Orihuela | 842.81 mi (1,356.37 km) |
| Hard to Osuna | 1,032.24 mi (1,661.23 km) |
| Hard to Ourense | 927.14 mi (1,492.09 km) |
| Hard to Oviedo | 803.83 mi (1,293.64 km) |
| Hard to Paiporta | 751.91 mi (1,210.08 km) |
| Hard to Pajara | 1,837.53 mi (2,957.21 km) |
| Hard to Palafolls | 527.14 mi (848.34 km) |
| Hard to Palafrugell | 500.57 mi (805.59 km) |
| Hard to Palamos | 505.57 mi (813.63 km) |
| Hard to Palencia | 792.03 mi (1,274.65 km) |
