| Gretna to Colton (California) | 1,618.88 mi (2,605.33 km) |
| Gretna to Columbia (Illinois) | 590.68 mi (950.61 km) |
| Gretna to Columbia (Maryland) | 985.79 mi (1,586.48 km) |
| Gretna to Columbia (Missouri) | 637.66 mi (1,026.21 km) |
| Gretna to Columbia (Pennsylvania) | 1,036.25 mi (1,667.68 km) |
| Gretna to Columbia (South Carolina) | 606.94 mi (976.77 km) |
| Gretna to Columbia (Tennessee) | 431.55 mi (694.51 km) |
| Gretna to Columbia Heights (Minnesota) | 1,060.30 mi (1,706.38 km) |
| Gretna to Columbine (Colorado) | 1,080.94 mi (1,739.60 km) |
| Gretna to Columbus (Georgia) | 354.56 mi (570.62 km) |
| Gretna to Columbus (Indiana) | 683.98 mi (1,100.76 km) |
| Gretna to Columbus (Mississippi) | 266.71 mi (429.22 km) |
| Gretna to Columbus (Nebraska) | 894.90 mi (1,440.20 km) |
| Gretna to Columbus (Ohio) | 802.33 mi (1,291.23 km) |
| Gretna to Commack (New York) | 1,205.85 mi (1,940.63 km) |
