| Donostia to Cookeville (Tennessee) | 4,277.43 mi (6,883.87 km) |
| Donostia to Coolidge (Arizona) | 5,547.17 mi (8,927.31 km) |
| Donostia to Coon Rapids (Minnesota) | 4,260.25 mi (6,856.22 km) |
| Donostia to Cooper City (Florida) | 4,442.37 mi (7,149.30 km) |
| Donostia to Coos Bay (Oregon) | 5,465.61 mi (8,796.05 km) |
| Donostia to Copiague (New York) | 3,555.78 mi (5,722.47 km) |
| Donostia to Coppell (Texas) | 4,928.96 mi (7,932.39 km) |
| Donostia to Copperas Cove (Texas) | 5,052.86 mi (8,131.79 km) |
| Donostia to Coral Gables (Florida) | 4,456.16 mi (7,171.50 km) |
| Donostia to Coral Springs (Florida) | 4,431.58 mi (7,131.94 km) |
| Donostia to Coral Terrace (Florida) | 4,455.99 mi (7,171.22 km) |
| Donostia to Coralville (Iowa) | 4,326.04 mi (6,962.08 km) |
| Donostia to Coram (New York) | 3,531.10 mi (5,682.76 km) |
| Donostia to Corcoran (California) | 5,694.92 mi (9,165.08 km) |
| Donostia to Cordele (Georgia) | 4,364.94 mi (7,024.69 km) |
