| Gretna to Cold Springs (Nevada) | 1,816.77 mi (2,923.80 km) |
| Gretna to Coldwater (Michigan) | 877.92 mi (1,412.88 km) |
| Gretna to Colesville (Maryland) | 974.44 mi (1,568.20 km) |
| Gretna to College (Alaska) | 3,428.87 mi (5,518.24 km) |
| Gretna to College Park (Georgia) | 417.01 mi (671.11 km) |
| Gretna to College Park (Maryland) | 974.19 mi (1,567.81 km) |
| Gretna to College Station (Texas) | 375.56 mi (604.41 km) |
| Gretna to Collegedale (Tennessee) | 459.48 mi (739.47 km) |
| Gretna to Colleyville (Texas) | 466.33 mi (750.49 km) |
| Gretna to Collierville (Tennessee) | 355.52 mi (572.15 km) |
| Gretna to Collinsville (Illinois) | 605.74 mi (974.84 km) |
| Gretna to Colonia (New Jersey) | 1,151.43 mi (1,853.05 km) |
| Gretna to Colonial Heights (Virginia) | 886.79 mi (1,427.16 km) |
| Gretna to Colonial Park (Pennsylvania) | 1,034.92 mi (1,665.54 km) |
| Gretna to Colorado Springs (Colorado) | 1,040.05 mi (1,673.80 km) |
