| Gretna to Cedar Park (Texas) | 465.59 mi (749.30 km) |
| Gretna to Cedar Rapids (Iowa) | 837.91 mi (1,348.48 km) |
| Gretna to Cedarburg (Wisconsin) | 932.05 mi (1,499.98 km) |
| Gretna to Celebration (Florida) | 524.77 mi (844.54 km) |
| Gretna to Celina (Ohio) | 797.62 mi (1,283.64 km) |
| Gretna to Celina (Texas) | 461.10 mi (742.06 km) |
| Gretna to Centennial (Colorado) | 1,072.18 mi (1,725.51 km) |
| Gretna to Center Point (Alabama) | 325.03 mi (523.08 km) |
| Gretna to Centereach (New York) | 1,215.57 mi (1,956.27 km) |
| Gretna to Centerton (Arkansas) | 508.51 mi (818.36 km) |
| Gretna to Centerville (Ohio) | 750.38 mi (1,207.62 km) |
| Gretna to Centerville (Utah) | 1,439.76 mi (2,317.08 km) |
| Gretna to Central (Louisiana) | 73.97 mi (119.05 km) |
| Gretna to Central Falls (Rhode Island) | 1,327.42 mi (2,136.28 km) |
| Gretna to Central Islip (New York) | 1,207.45 mi (1,943.21 km) |
