| Gretna to Clarksdale (Mississippi) | 297.49 mi (478.76 km) |
| Gretna to Clarkston (Georgia) | 434.56 mi (699.35 km) |
| Gretna to Clarksville (Indiana) | 630.55 mi (1,014.77 km) |
| Gretna to Clarksville (Tennessee) | 485.96 mi (782.08 km) |
| Gretna to Clawson (Michigan) | 952.60 mi (1,533.05 km) |
| Gretna to Clay (Alabama) | 330.48 mi (531.86 km) |
| Gretna to Clayton (California) | 1,899.43 mi (3,056.84 km) |
| Gretna to Clayton (Missouri) | 603.69 mi (971.55 km) |
| Gretna to Clayton (North Carolina) | 781.43 mi (1,257.58 km) |
| Gretna to Clayton (Ohio) | 760.23 mi (1,223.48 km) |
| Gretna to Clearfield (Utah) | 1,451.45 mi (2,335.88 km) |
| Gretna to Clearlake (California) | 1,946.95 mi (3,133.31 km) |
| Gretna to Clearwater (Florida) | 460.37 mi (740.90 km) |
| Gretna to Cleburne (Texas) | 467.02 mi (751.59 km) |
| Gretna to Clemmons (North Carolina) | 701.36 mi (1,128.73 km) |
