| Gretna to Central Point (Oregon) | 2,009.00 mi (3,233.18 km) |
| Gretna to Centralia (Illinois) | 597.40 mi (961.42 km) |
| Gretna to Centralia (Washington) | 2,105.59 mi (3,388.63 km) |
| Gretna to Centreville (Virginia) | 945.91 mi (1,522.30 km) |
| Gretna to Ceres (California) | 1,843.91 mi (2,967.49 km) |
| Gretna to Cerritos (California) | 1,660.94 mi (2,673.02 km) |
| Gretna to Chalco (Nebraska) | 850.00 mi (1,367.94 km) |
| Gretna to Chalmette (Louisiana) | 5.62 mi (9.05 km) |
| Gretna to Chambersburg (Pennsylvania) | 984.31 mi (1,584.10 km) |
| Gretna to Chamblee (Georgia) | 434.82 mi (699.78 km) |
| Gretna to Champaign (Illinois) | 712.13 mi (1,146.06 km) |
| Gretna to Champlin (Minnesota) | 1,069.86 mi (1,721.78 km) |
| Gretna to Chandler (Arizona) | 1,301.43 mi (2,094.45 km) |
| Gretna to Chanhassen (Minnesota) | 1,050.12 mi (1,690.00 km) |
| Gretna to Channahon (Illinois) | 801.61 mi (1,290.06 km) |
