| Gretna to Blue Island (Illinois) | 822.39 mi (1,323.51 km) |
| Gretna to Blue Springs (Missouri) | 673.08 mi (1,083.21 km) |
| Gretna to Bluffdale (Utah) | 1,429.33 mi (2,300.29 km) |
| Gretna to Bluffton (Indiana) | 797.00 mi (1,282.65 km) |
| Gretna to Bluffton (South Carolina) | 562.53 mi (905.30 km) |
| Gretna to Blythe (California) | 1,462.23 mi (2,353.23 km) |
| Gretna to Blytheville (Arkansas) | 416.17 mi (669.75 km) |
| Gretna to Boca Raton (Florida) | 652.86 mi (1,050.68 km) |
| Gretna to Boerne (Texas) | 519.99 mi (836.84 km) |
| Gretna to Bogalusa (Louisiana) | 61.22 mi (98.53 km) |
| Gretna to Boiling Springs (South Carolina) | 588.98 mi (947.86 km) |
| Gretna to Boise (Idaho) | 1,718.99 mi (2,766.44 km) |
| Gretna to Bolingbrook (Illinois) | 821.15 mi (1,321.52 km) |
| Gretna to Bolivar (Missouri) | 565.67 mi (910.36 km) |
| Gretna to Bon Air (Virginia) | 887.95 mi (1,429.01 km) |
