| Gretna to Barberino di Mugello | 5,322.76 mi (8,566.15 km) |
| Gretna to Barcellona-Pozzo di Gotto | 5,708.22 mi (9,186.50 km) |
| Gretna to Bareggio | 5,177.20 mi (8,331.90 km) |
| Gretna to Barga | 5,287.40 mi (8,509.24 km) |
| Gretna to Bari | 5,670.54 mi (9,125.86 km) |
| Gretna to Barletta | 5,637.91 mi (9,073.34 km) |
| Gretna to Baronissi | 5,592.40 mi (9,000.10 km) |
| Gretna to Barrafranca | 5,690.17 mi (9,157.45 km) |
| Gretna to Bassano del Grappa | 5,284.30 mi (8,504.26 km) |
| Gretna to Battipaglia | 5,606.60 mi (9,022.94 km) |
| Gretna to Beinasco | 5,130.81 mi (8,257.24 km) |
| Gretna to Bellinzago Novarese | 5,158.45 mi (8,301.73 km) |
| Gretna to Belluno | 5,291.86 mi (8,516.42 km) |
| Gretna to Belmonte Mezzagno | 5,627.36 mi (9,056.36 km) |
| Gretna to Belpasso | 5,718.51 mi (9,203.06 km) |
