| Cal to Olivares | 1,930.66 mi (3,107.10 km) |
| Cal to Olivenza | 1,964.03 mi (3,160.80 km) |
| Cal to Olot | 1,443.14 mi (2,322.50 km) |
| Cal to Onate | 1,694.09 mi (2,726.37 km) |
| Cal to Onda | 1,590.18 mi (2,559.15 km) |
| Cal to Onteniente | 1,617.06 mi (2,602.41 km) |
| Cal to Orihuela | 1,642.85 mi (2,643.91 km) |
| Cal to Osuna | 1,877.05 mi (3,020.83 km) |
| Cal to Ourense | 1,971.97 mi (3,173.58 km) |
| Cal to Oviedo | 1,866.74 mi (3,004.22 km) |
| Cal to Paiporta | 1,601.94 mi (2,578.07 km) |
| Cal to Pajara | 2,577.80 mi (4,148.57 km) |
| Cal to Palafolls | 1,428.64 mi (2,299.17 km) |
| Cal to Palafrugell | 1,407.88 mi (2,265.76 km) |
| Cal to Palamos | 1,409.46 mi (2,268.31 km) |
