| Gretna to Bound Brook (New Jersey) | 1,140.85 mi (1,836.02 km) |
| Gretna to Bountiful (Utah) | 1,437.17 mi (2,312.90 km) |
| Gretna to Bourbonnais (Illinois) | 788.33 mi (1,268.69 km) |
| Gretna to Bowie (Maryland) | 980.94 mi (1,578.67 km) |
| Gretna to Bowling Green (Kentucky) | 530.40 mi (853.60 km) |
| Gretna to Bowling Green (Ohio) | 869.40 mi (1,399.16 km) |
| Gretna to Box Elder (South Dakota) | 1,213.14 mi (1,952.36 km) |
| Gretna to Boynton Beach (Florida) | 650.12 mi (1,046.27 km) |
| Gretna to Bozeman (Montana) | 1,572.83 mi (2,531.23 km) |
| Gretna to Bradenton (Florida) | 482.81 mi (777.01 km) |
| Gretna to Bradfordville (Florida) | 351.90 mi (566.34 km) |
| Gretna to Bradley (Illinois) | 787.33 mi (1,267.08 km) |
| Gretna to Bradley Gardens (New Jersey) | 1,135.45 mi (1,827.34 km) |
| Gretna to Brainerd (Minnesota) | 1,157.95 mi (1,863.55 km) |
| Gretna to Brambleton (Virginia) | 947.82 mi (1,525.37 km) |
