| Gretna to Borsbeek | 4,821.16 mi (7,758.91 km) |
| Gretna to Boussu | 4,814.09 mi (7,747.52 km) |
| Gretna to Braine-l'Alleud | 4,830.71 mi (7,774.28 km) |
| Gretna to Braine-le-Chateau | 4,826.41 mi (7,767.35 km) |
| Gretna to Braine-le-Comte | 4,823.27 mi (7,762.30 km) |
| Gretna to Brasschaat | 4,818.90 mi (7,755.27 km) |
| Gretna to Brecht | 4,823.09 mi (7,762.01 km) |
| Gretna to Bredene | 4,759.96 mi (7,660.41 km) |
| Gretna to Bree | 4,866.75 mi (7,832.27 km) |
| Gretna to Bruges | 4,770.57 mi (7,677.50 km) |
| Gretna to Brussels | 4,825.45 mi (7,765.81 km) |
| Gretna to Buggenhout | 4,815.21 mi (7,749.33 km) |
| Gretna to Chapelle-lez-Herlaimont | 4,832.93 mi (7,777.84 km) |
| Gretna to Charleroi | 4,840.81 mi (7,790.53 km) |
| Gretna to Chatelet | 4,844.18 mi (7,795.96 km) |
