| Donostia to Castrovillari | 968.29 mi (1,558.31 km) |
| Donostia to Catania | 981.58 mi (1,579.69 km) |
| Donostia to Catanzaro | 1,011.80 mi (1,628.33 km) |
| Donostia to Cattolica | 736.03 mi (1,184.53 km) |
| Donostia to Cava de' Tirreni | 873.67 mi (1,406.03 km) |
| Donostia to Cavallino | 1,056.88 mi (1,700.89 km) |
| Donostia to Cavarzere | 706.47 mi (1,136.96 km) |
| Donostia to Cave | 764.89 mi (1,230.97 km) |
| Donostia to Cavriago | 628.45 mi (1,011.39 km) |
| Donostia to Cavriglia | 675.07 mi (1,086.42 km) |
| Donostia to Cazzago San Martino | 611.77 mi (984.54 km) |
| Donostia to Ceccano | 788.97 mi (1,269.72 km) |
| Donostia to Cecina | 627.61 mi (1,010.04 km) |
| Donostia to Cefalu | 912.42 mi (1,468.40 km) |
| Donostia to Ceglie Messapico | 1,014.89 mi (1,633.31 km) |
