| Donostia to Cicero (Illinois) | 4,156.67 mi (6,689.52 km) |
| Donostia to Cimarron Hills (Colorado) | 4,988.45 mi (8,028.13 km) |
| Donostia to Cincinnati (Ohio) | 4,115.95 mi (6,623.99 km) |
| Donostia to Cinco Ranch (Texas) | 5,017.68 mi (8,075.18 km) |
| Donostia to Circleville (Ohio) | 4,027.95 mi (6,482.36 km) |
| Donostia to Citrus (California) | 5,735.76 mi (9,230.82 km) |
| Donostia to Citrus Heights (California) | 5,618.50 mi (9,042.10 km) |
| Donostia to Citrus Park (Florida) | 4,467.97 mi (7,190.50 km) |
| Donostia to Claiborne (Louisiana) | 4,732.15 mi (7,615.67 km) |
| Donostia to Claremont (California) | 5,728.69 mi (9,219.44 km) |
| Donostia to Claremont (New Hampshire) | 3,422.62 mi (5,508.17 km) |
| Donostia to Claremore (Oklahoma) | 4,721.43 mi (7,598.40 km) |
| Donostia to Clarksburg (Maryland) | 3,783.57 mi (6,089.07 km) |
| Donostia to Clarksburg (West Virginia) | 3,921.52 mi (6,311.08 km) |
| Donostia to Clarksdale (Mississippi) | 4,587.67 mi (7,383.14 km) |
