| Gretna to Badger (Alaska) | 3,415.31 mi (5,496.41 km) |
| Gretna to Bailey's Crossroads (Virginia) | 959.61 mi (1,544.34 km) |
| Gretna to Bainbridge (Georgia) | 333.57 mi (536.83 km) |
| Gretna to Bainbridge Island (Washington) | 2,111.73 mi (3,398.50 km) |
| Gretna to Baker (Louisiana) | 80.78 mi (130.01 km) |
| Gretna to Bakersfield (California) | 1,721.36 mi (2,770.26 km) |
| Gretna to Balch Springs (Texas) | 433.22 mi (697.19 km) |
| Gretna to Baldwin (New York) | 1,184.36 mi (1,906.04 km) |
| Gretna to Baldwin (Pennsylvania) | 918.88 mi (1,478.80 km) |
| Gretna to Baldwin Park (California) | 1,655.94 mi (2,664.98 km) |
| Gretna to Ballenger Creek (Maryland) | 969.60 mi (1,560.42 km) |
| Gretna to Ballwin (Missouri) | 600.74 mi (966.80 km) |
| Gretna to Baltimore (Maryland) | 1,000.62 mi (1,610.34 km) |
| Gretna to Bangor (Maine) | 1,548.81 mi (2,492.57 km) |
| Gretna to Banning (California) | 1,594.14 mi (2,565.52 km) |
