| Gretna to Belvedere Marittimo | 5,683.03 mi (9,145.96 km) |
| Gretna to Benevento | 5,578.82 mi (8,978.25 km) |
| Gretna to Bergamo | 5,199.25 mi (8,367.38 km) |
| Gretna to Bernalda | 5,689.26 mi (9,155.99 km) |
| Gretna to Bertinoro | 5,356.31 mi (8,620.15 km) |
| Gretna to Besana in Brianza | 5,182.58 mi (8,340.56 km) |
| Gretna to Besozzo | 5,151.44 mi (8,290.44 km) |
| Gretna to Biancavilla | 5,710.66 mi (9,190.41 km) |
| Gretna to Biassono | 5,184.01 mi (8,342.86 km) |
| Gretna to Bibbiano | 5,267.09 mi (8,476.57 km) |
| Gretna to Bibbiena | 5,358.06 mi (8,622.96 km) |
| Gretna to Biella | 5,134.59 mi (8,263.32 km) |
| Gretna to Bisceglie | 5,650.35 mi (9,093.36 km) |
| Gretna to Bisignano | 5,705.42 mi (9,181.99 km) |
| Gretna to Bitetto | 5,668.92 mi (9,123.25 km) |
