| Gretna to Oxford (Alabama) | 353.87 mi (569.49 km) |
| Gretna to Oxford (Mississippi) | 309.13 mi (497.50 km) |
| Gretna to Oxford (Ohio) | 727.95 mi (1,171.52 km) |
| Gretna to Oxnard (California) | 1,725.33 mi (2,776.65 km) |
| Gretna to Oxon Hill (Maryland) | 964.09 mi (1,551.55 km) |
| Gretna to Ozark (Alabama) | 282.50 mi (454.64 km) |
| Gretna to Ozark (Missouri) | 524.98 mi (844.87 km) |
| Gretna to Pace (Florida) | 178.98 mi (288.03 km) |
| Gretna to Pacific Grove (California) | 1,889.47 mi (3,040.81 km) |
| Gretna to Pacifica (California) | 1,926.44 mi (3,100.30 km) |
| Gretna to Paducah (Kentucky) | 501.36 mi (806.86 km) |
| Gretna to Pahrump (Nevada) | 1,558.99 mi (2,508.96 km) |
| Gretna to Painesville (Ohio) | 952.30 mi (1,532.58 km) |
| Gretna to Palatine (Illinois) | 850.85 mi (1,369.31 km) |
| Gretna to Palatka (Florida) | 502.81 mi (809.20 km) |
