| Donostia to Collegno | 488.18 mi (785.65 km) |
| Donostia to Cologno al Serio | 596.31 mi (959.67 km) |
| Donostia to Cologno Monzese | 575.56 mi (926.28 km) |
| Donostia to Colorno | 622.57 mi (1,001.92 km) |
| Donostia to Comacchio | 709.33 mi (1,141.55 km) |
| Donostia to Comiso | 977.78 mi (1,573.59 km) |
| Donostia to Como | 570.71 mi (918.46 km) |
| Donostia to Concordia Sagittaria | 748.41 mi (1,204.45 km) |
| Donostia to Concorezzo | 579.14 mi (932.03 km) |
| Donostia to Conegliano | 723.30 mi (1,164.04 km) |
| Donostia to Conselice | 691.60 mi (1,113.02 km) |
| Donostia to Conselve | 696.71 mi (1,121.24 km) |
| Donostia to Conversano | 989.50 mi (1,592.44 km) |
| Donostia to Copertino | 1,050.44 mi (1,690.52 km) |
| Donostia to Copparo | 693.03 mi (1,115.33 km) |
