| Castellana Grotte to Olivenza | 1,293.20 mi (2,081.21 km) |
| Castellana Grotte to Olot | 763.48 mi (1,228.70 km) |
| Castellana Grotte to Onate | 1,014.72 mi (1,633.04 km) |
| Castellana Grotte to Onda | 917.52 mi (1,476.61 km) |
| Castellana Grotte to Onteniente | 951.77 mi (1,531.72 km) |
| Castellana Grotte to Orihuela | 983.19 mi (1,582.29 km) |
| Castellana Grotte to Osuna | 1,217.43 mi (1,959.27 km) |
| Castellana Grotte to Ourense | 1,292.26 mi (2,079.69 km) |
| Castellana Grotte to Oviedo | 1,187.78 mi (1,911.55 km) |
| Castellana Grotte to Paiporta | 932.46 mi (1,500.65 km) |
| Castellana Grotte to Pajara | 1,963.21 mi (3,159.49 km) |
| Castellana Grotte to Palafolls | 749.66 mi (1,206.46 km) |
| Castellana Grotte to Palafrugell | 728.46 mi (1,172.34 km) |
| Castellana Grotte to Palamos | 730.15 mi (1,175.07 km) |
| Castellana Grotte to Palencia | 1,123.50 mi (1,808.10 km) |
