| Donostia to Culpeper (Virginia) | 3,844.22 mi (6,186.67 km) |
| Donostia to Culver City (California) | 5,760.61 mi (9,270.81 km) |
| Donostia to Cumberland (Maryland) | 3,837.05 mi (6,175.14 km) |
| Donostia to Cupertino (California) | 5,718.15 mi (9,202.48 km) |
| Donostia to Cutler Bay (Florida) | 4,464.71 mi (7,185.26 km) |
| Donostia to Cutlerville (Michigan) | 4,029.87 mi (6,485.44 km) |
| Donostia to Cuyahoga Falls (Ohio) | 3,908.15 mi (6,289.56 km) |
| Donostia to Cypress (California) | 5,756.95 mi (9,264.91 km) |
| Donostia to Cypress Gardens (Florida) | 4,428.36 mi (7,126.75 km) |
| Donostia to Cypress Lake (Florida) | 4,500.47 mi (7,242.81 km) |
| Donostia to D'Iberville (Mississippi) | 4,668.49 mi (7,513.21 km) |
| Donostia to Dakota Ridge (Colorado) | 4,970.80 mi (7,999.73 km) |
| Donostia to Dale City (Virginia) | 3,807.63 mi (6,127.79 km) |
| Donostia to Dallas (Georgia) | 4,335.80 mi (6,977.79 km) |
| Donostia to Dallas (Oregon) | 5,354.14 mi (8,616.65 km) |
