| Gretna to Petersburg (Virginia) | 884.89 mi (1,424.09 km) |
| Gretna to Pflugerville (Texas) | 452.42 mi (728.10 km) |
| Gretna to Pharr (Texas) | 559.40 mi (900.27 km) |
| Gretna to Phelan (California) | 1,631.65 mi (2,625.88 km) |
| Gretna to Phenix City (Alabama) | 345.29 mi (555.69 km) |
| Gretna to Philadelphia (Pennsylvania) | 1,092.90 mi (1,758.85 km) |
| Gretna to Phillipsburg (New Jersey) | 1,118.58 mi (1,800.18 km) |
| Gretna to Phoenix (Arizona) | 1,316.75 mi (2,119.11 km) |
| Gretna to Phoenixville (Pennsylvania) | 1,081.47 mi (1,740.46 km) |
| Gretna to Picayune (Mississippi) | 48.58 mi (78.18 km) |
| Gretna to Pickerington (Ohio) | 802.87 mi (1,292.09 km) |
| Gretna to Pico Rivera (California) | 1,662.37 mi (2,675.33 km) |
| Gretna to Piedmont (California) | 1,914.65 mi (3,081.33 km) |
| Gretna to Pierre (South Dakota) | 1,146.19 mi (1,844.62 km) |
| Gretna to Pike Creek Valley (Delaware) | 1,057.33 mi (1,701.61 km) |
