| Gretna to Pittsburg (Kansas) | 583.01 mi (938.26 km) |
| Gretna to Pittsburgh (Pennsylvania) | 922.24 mi (1,484.19 km) |
| Gretna to Pittsfield (Massachusetts) | 1,271.39 mi (2,046.10 km) |
| Gretna to Placentia (California) | 1,648.74 mi (2,653.39 km) |
| Gretna to Placerville (California) | 1,846.95 mi (2,972.38 km) |
| Gretna to Plainfield (Illinois) | 815.52 mi (1,312.45 km) |
| Gretna to Plainfield (Indiana) | 707.41 mi (1,138.47 km) |
| Gretna to Plainfield (New Jersey) | 1,148.01 mi (1,847.54 km) |
| Gretna to Plainview (New York) | 1,195.27 mi (1,923.60 km) |
| Gretna to Plainview (Texas) | 744.17 mi (1,197.62 km) |
| Gretna to Plano (Illinois) | 817.35 mi (1,315.39 km) |
| Gretna to Plano (Texas) | 450.18 mi (724.50 km) |
| Gretna to Plant City (Florida) | 496.92 mi (799.72 km) |
| Gretna to Plantation (Florida) | 651.54 mi (1,048.55 km) |
| Gretna to Platteville (Wisconsin) | 885.93 mi (1,425.77 km) |
