| Rockville to Barberino di Mugello | 4,354.60 mi (7,008.05 km) |
| Rockville to Barcellona-Pozzo di Gotto | 4,742.76 mi (7,632.74 km) |
| Rockville to Bareggio | 4,208.97 mi (6,773.68 km) |
| Rockville to Barga | 4,319.29 mi (6,951.22 km) |
| Rockville to Bari | 4,702.47 mi (7,567.89 km) |
| Rockville to Barletta | 4,669.86 mi (7,515.41 km) |
| Rockville to Baronissi | 4,624.92 mi (7,443.08 km) |
| Rockville to Barrafranca | 4,726.35 mi (7,606.33 km) |
| Rockville to Bassano del Grappa | 4,316.25 mi (6,946.33 km) |
| Rockville to Battipaglia | 4,639.13 mi (7,465.96 km) |
| Rockville to Beinasco | 4,162.75 mi (6,699.30 km) |
| Rockville to Bellinzago Novarese | 4,190.22 mi (6,743.51 km) |
| Rockville to Belluno | 4,324.02 mi (6,958.83 km) |
| Rockville to Belmonte Mezzagno | 4,663.16 mi (7,504.63 km) |
| Rockville to Belpasso | 4,753.87 mi (7,650.61 km) |
