| Gretna to The Villages (Florida) | 490.16 mi (788.84 km) |
| Gretna to The Woodlands (Texas) | 327.16 mi (526.51 km) |
| Gretna to Thibodaux (Louisiana) | 46.42 mi (74.70 km) |
| Gretna to Thomasville (Georgia) | 367.62 mi (591.63 km) |
| Gretna to Thomasville (North Carolina) | 709.85 mi (1,142.40 km) |
| Gretna to Thonotosassa (Florida) | 486.30 mi (782.63 km) |
| Gretna to Thornton (Colorado) | 1,088.32 mi (1,751.48 km) |
| Gretna to Thousand Oaks (California) | 1,707.85 mi (2,748.52 km) |
| Gretna to Three Lakes (Florida) | 659.27 mi (1,060.99 km) |
| Gretna to Tiffin (Ohio) | 864.63 mi (1,391.48 km) |
| Gretna to Tifton (Georgia) | 402.55 mi (647.84 km) |
| Gretna to Tigard (Oregon) | 2,065.42 mi (3,323.97 km) |
| Gretna to Tillmans Corner (Alabama) | 119.16 mi (191.77 km) |
| Gretna to Timberlake (Virginia) | 804.18 mi (1,294.20 km) |
| Gretna to Timberlane (Louisiana) | 2.55 mi (4.10 km) |
