| Gretna to Beyne-Heusay | 4,883.83 mi (7,859.76 km) |
| Gretna to Bierbeek | 4,842.43 mi (7,793.15 km) |
| Gretna to Bilzen | 4,871.51 mi (7,839.94 km) |
| Gretna to Binche | 4,830.01 mi (7,773.15 km) |
| Gretna to Bissegem | 4,780.49 mi (7,693.45 km) |
| Gretna to Blankenberge | 4,763.90 mi (7,666.76 km) |
| Gretna to Blegny | 4,885.76 mi (7,862.87 km) |
| Gretna to Bocholt | 4,865.51 mi (7,830.28 km) |
| Gretna to Boechout | 4,822.51 mi (7,761.08 km) |
| Gretna to Bonheiden | 4,827.66 mi (7,769.36 km) |
| Gretna to Boom | 4,819.65 mi (7,756.47 km) |
| Gretna to Boortmeerbeek | 4,830.35 mi (7,773.69 km) |
| Gretna to Borgerhout | 4,819.15 mi (7,755.67 km) |
| Gretna to Borgloon | 4,866.38 mi (7,831.68 km) |
| Gretna to Bornem | 4,813.86 mi (7,747.17 km) |
