| Gretna to Parma Heights (Ohio) | 918.32 mi (1,477.89 km) |
| Gretna to Parole (Maryland) | 990.46 mi (1,594.00 km) |
| Gretna to Parsippany (New Jersey) | 1,158.11 mi (1,863.79 km) |
| Gretna to Pasadena (California) | 1,665.69 mi (2,680.67 km) |
| Gretna to Pasadena (Maryland) | 997.15 mi (1,604.76 km) |
| Gretna to Pasadena (Texas) | 306.20 mi (492.78 km) |
| Gretna to Pasadena Hills (Florida) | 484.74 mi (780.11 km) |
| Gretna to Pascagoula (Mississippi) | 95.07 mi (153.00 km) |
| Gretna to Pasco (Washington) | 1,925.28 mi (3,098.44 km) |
| Gretna to Passaic (New Jersey) | 1,169.95 mi (1,882.85 km) |
| Gretna to Pataskala (Ohio) | 811.45 mi (1,305.90 km) |
| Gretna to Patchogue (New York) | 1,214.37 mi (1,954.34 km) |
| Gretna to Paterson (New Jersey) | 1,170.78 mi (1,884.19 km) |
| Gretna to Patterson (California) | 1,853.28 mi (2,982.56 km) |
| Gretna to Pawtucket (Rhode Island) | 1,327.67 mi (2,136.67 km) |
