| Gretna to Baraboo (Wisconsin) | 937.02 mi (1,507.99 km) |
| Gretna to Barberton (Ohio) | 901.24 mi (1,450.40 km) |
| Gretna to Bardstown (Kentucky) | 606.44 mi (975.97 km) |
| Gretna to Barrington (Illinois) | 852.53 mi (1,372.02 km) |
| Gretna to Barstow (California) | 1,606.64 mi (2,585.64 km) |
| Gretna to Bartlesville (Oklahoma) | 581.30 mi (935.51 km) |
| Gretna to Bartlett (Illinois) | 840.27 mi (1,352.29 km) |
| Gretna to Bartlett (Tennessee) | 368.07 mi (592.36 km) |
| Gretna to Bartow (Florida) | 516.95 mi (831.95 km) |
| Gretna to Batavia (Illinois) | 830.50 mi (1,336.57 km) |
| Gretna to Batavia (New York) | 1,116.92 mi (1,797.51 km) |
| Gretna to Batesville (Arkansas) | 414.92 mi (667.75 km) |
| Gretna to Baton Rouge (Louisiana) | 74.22 mi (119.45 km) |
| Gretna to Battle Creek (Michigan) | 896.86 mi (1,443.36 km) |
| Gretna to Battle Ground (Washington) | 2,062.85 mi (3,319.83 km) |
