| Gretna to Cullman (Alabama) | 349.65 mi (562.72 km) |
| Gretna to Culpeper (Virginia) | 906.40 mi (1,458.71 km) |
| Gretna to Culver City (California) | 1,680.04 mi (2,703.77 km) |
| Gretna to Cumberland (Maryland) | 927.83 mi (1,493.20 km) |
| Gretna to Cupertino (California) | 1,900.70 mi (3,058.89 km) |
| Gretna to Cutler Bay (Florida) | 664.95 mi (1,070.13 km) |
| Gretna to Cutlerville (Michigan) | 925.63 mi (1,489.66 km) |
| Gretna to Cuyahoga Falls (Ohio) | 912.50 mi (1,468.53 km) |
| Gretna to Cypress (California) | 1,659.11 mi (2,670.09 km) |
| Gretna to Cypress Gardens (Florida) | 522.49 mi (840.86 km) |
| Gretna to Cypress Lake (Florida) | 547.99 mi (881.90 km) |
| Gretna to D'Iberville (Mississippi) | 78.88 mi (126.94 km) |
| Gretna to Dakota Ridge (Colorado) | 1,085.02 mi (1,746.16 km) |
| Gretna to Dale City (Virginia) | 942.07 mi (1,516.11 km) |
| Gretna to Dallas (Georgia) | 412.12 mi (663.25 km) |
