| Gretna to Bonham (Texas) | 441.05 mi (709.81 km) |
| Gretna to Bonita (California) | 1,599.93 mi (2,574.84 km) |
| Gretna to Bonita Springs (Florida) | 560.09 mi (901.37 km) |
| Gretna to Bonney Lake (Washington) | 2,082.89 mi (3,352.09 km) |
| Gretna to Boone (Iowa) | 865.57 mi (1,393.01 km) |
| Gretna to Boone (North Carolina) | 651.62 mi (1,048.68 km) |
| Gretna to Borger (Texas) | 768.91 mi (1,237.44 km) |
| Gretna to Bossier City (Louisiana) | 279.63 mi (450.02 km) |
| Gretna to Boston (Massachusetts) | 1,356.75 mi (2,183.48 km) |
| Gretna to Bostonia (California) | 1,595.15 mi (2,567.15 km) |
| Gretna to Bothell (Washington) | 2,100.97 mi (3,381.19 km) |
| Gretna to Bothell East (Washington) | 2,101.06 mi (3,381.33 km) |
| Gretna to Bothell West (Washington) | 2,103.39 mi (3,385.09 km) |
| Gretna to Boulder (Colorado) | 1,105.89 mi (1,779.75 km) |
| Gretna to Boulder City (Nevada) | 1,495.78 mi (2,407.23 km) |
