| Gretna to Payson (Arizona) | 1,278.02 mi (2,056.78 km) |
| Gretna to Payson (Utah) | 1,407.64 mi (2,265.37 km) |
| Gretna to Peabody (Massachusetts) | 1,369.68 mi (2,204.29 km) |
| Gretna to Peachtree City (Georgia) | 402.20 mi (647.27 km) |
| Gretna to Peachtree Corners (Georgia) | 441.44 mi (710.43 km) |
| Gretna to Pearl (Mississippi) | 163.28 mi (262.77 km) |
| Gretna to Pearl City (Hawaii) | 4,211.45 mi (6,777.68 km) |
| Gretna to Pearl River (New York) | 1,183.37 mi (1,904.45 km) |
| Gretna to Pearland (Texas) | 317.10 mi (510.33 km) |
| Gretna to Pebble Creek (Florida) | 481.14 mi (774.33 km) |
| Gretna to Pecan Grove (Texas) | 341.30 mi (549.26 km) |
| Gretna to Pecos (Texas) | 806.60 mi (1,298.09 km) |
| Gretna to Peekskill (New York) | 1,195.99 mi (1,924.76 km) |
| Gretna to Pekin (Illinois) | 736.77 mi (1,185.71 km) |
| Gretna to Pelham (Alabama) | 304.59 mi (490.19 km) |
