| Republic to Olivares | 4,603.21 mi (7,408.15 km) |
| Republic to Olivenza | 4,515.11 mi (7,266.37 km) |
| Republic to Olot | 4,826.46 mi (7,767.43 km) |
| Republic to Onate | 4,582.30 mi (7,374.50 km) |
| Republic to Onda | 4,786.21 mi (7,702.66 km) |
| Republic to Onteniente | 4,812.12 mi (7,744.37 km) |
| Republic to Orihuela | 4,823.43 mi (7,762.56 km) |
| Republic to Osuna | 4,659.47 mi (7,498.70 km) |
| Republic to Ourense | 4,361.41 mi (7,019.01 km) |
| Republic to Oviedo | 4,419.84 mi (7,113.04 km) |
| Republic to Paiporta | 4,798.66 mi (7,722.69 km) |
| Republic to Pajara | 4,517.99 mi (7,270.99 km) |
| Republic to Palafolls | 4,856.86 mi (7,816.35 km) |
| Republic to Palafrugell | 4,865.45 mi (7,830.19 km) |
| Republic to Palamos | 4,866.65 mi (7,832.12 km) |
