| Gretna to Crawfordsville (Indiana) | 722.37 mi (1,162.54 km) |
| Gretna to Crest Hill (Illinois) | 813.02 mi (1,308.43 km) |
| Gretna to Crestview (Florida) | 215.04 mi (346.08 km) |
| Gretna to Crestwood (Illinois) | 821.03 mi (1,321.32 km) |
| Gretna to Crestwood (Missouri) | 597.73 mi (961.95 km) |
| Gretna to Creve Coeur (Missouri) | 605.11 mi (973.83 km) |
| Gretna to Crofton (Maryland) | 985.98 mi (1,586.77 km) |
| Gretna to Crossville (Tennessee) | 508.85 mi (818.91 km) |
| Gretna to Crowley (Louisiana) | 140.56 mi (226.22 km) |
| Gretna to Crowley (Texas) | 469.21 mi (755.12 km) |
| Gretna to Crown Point (Indiana) | 809.12 mi (1,302.16 km) |
| Gretna to Crystal (Minnesota) | 1,060.59 mi (1,706.86 km) |
| Gretna to Crystal Lake (Illinois) | 856.78 mi (1,378.85 km) |
| Gretna to Cudahy (California) | 1,667.70 mi (2,683.91 km) |
| Gretna to Cudahy (Wisconsin) | 908.82 mi (1,462.60 km) |
