| Gretna to Buena Park (California) | 1,657.25 mi (2,667.08 km) |
| Gretna to Buenaventura Lakes (Florida) | 535.99 mi (862.59 km) |
| Gretna to Buffalo (Minnesota) | 1,075.15 mi (1,730.28 km) |
| Gretna to Buffalo (New York) | 1,090.42 mi (1,754.87 km) |
| Gretna to Buffalo Grove (Illinois) | 854.84 mi (1,375.73 km) |
| Gretna to Buford (Georgia) | 458.82 mi (738.40 km) |
| Gretna to Bull Run (Virginia) | 939.96 mi (1,512.72 km) |
| Gretna to Bullhead City (Arizona) | 1,467.68 mi (2,362.01 km) |
| Gretna to Burbank (California) | 1,676.31 mi (2,697.76 km) |
| Gretna to Burbank (Illinois) | 827.52 mi (1,331.77 km) |
| Gretna to Burien (Washington) | 2,098.36 mi (3,376.99 km) |
| Gretna to Burkburnett (Texas) | 575.71 mi (926.52 km) |
| Gretna to Burke (Virginia) | 950.96 mi (1,530.43 km) |
| Gretna to Burke Centre (Virginia) | 949.91 mi (1,528.73 km) |
| Gretna to Burleson (Texas) | 466.39 mi (750.58 km) |
