| Gretna to Bougival | 4,786.97 mi (7,703.88 km) |
| Gretna to Bouguenais | 4,667.26 mi (7,511.22 km) |
| Gretna to Boulogne-Billancourt | 4,792.02 mi (7,712.01 km) |
| Gretna to Boulogne-sur-Mer | 4,717.74 mi (7,592.47 km) |
| Gretna to Bourg-de-Peage | 5,019.00 mi (8,077.30 km) |
| Gretna to Bourg-en-Bresse | 4,992.57 mi (8,034.77 km) |
| Gretna to Bourg-la-Reine | 4,796.60 mi (7,719.38 km) |
| Gretna to Bourg-les-Valence | 5,014.82 mi (8,070.57 km) |
| Gretna to Bourges | 4,845.15 mi (7,797.51 km) |
| Gretna to Bourgoin-Jallieu | 5,012.69 mi (8,067.14 km) |
| Gretna to Bressuire | 4,725.43 mi (7,604.84 km) |
| Gretna to Brest | 4,513.96 mi (7,264.51 km) |
| Gretna to Bretigny-sur-Orge | 4,800.63 mi (7,725.87 km) |
| Gretna to Breuillet | 4,796.13 mi (7,718.63 km) |
| Gretna to Briancon | 5,093.06 mi (8,196.48 km) |
