| Gretna to Town and Country (Missouri) | 603.10 mi (970.59 km) |
| Gretna to Towson (Maryland) | 1,004.09 mi (1,615.92 km) |
| Gretna to Tracy (California) | 1,871.68 mi (3,012.18 km) |
| Gretna to Traverse City (Michigan) | 1,053.92 mi (1,696.12 km) |
| Gretna to Travilah (Maryland) | 963.21 mi (1,550.14 km) |
| Gretna to Trenton (Michigan) | 927.01 mi (1,491.87 km) |
| Gretna to Trenton (New Jersey) | 1,117.46 mi (1,798.38 km) |
| Gretna to Trenton (Ohio) | 733.05 mi (1,179.73 km) |
| Gretna to Triangle (Virginia) | 939.22 mi (1,511.53 km) |
| Gretna to Trinity (Florida) | 462.19 mi (743.82 km) |
| Gretna to Trophy Club (Texas) | 471.76 mi (759.22 km) |
| Gretna to Trotwood (Ohio) | 755.85 mi (1,216.42 km) |
| Gretna to Troutdale (Oregon) | 2,050.43 mi (3,299.86 km) |
| Gretna to Troy (Alabama) | 275.28 mi (443.03 km) |
| Gretna to Troy (Illinois) | 609.24 mi (980.47 km) |
