| Potomac to Bitonto | 4,699.32 mi (7,562.82 km) |
| Potomac to Bitritto | 4,708.38 mi (7,577.40 km) |
| Potomac to Bollate | 4,216.58 mi (6,785.92 km) |
| Potomac to Bologna | 4,346.91 mi (6,995.68 km) |
| Potomac to Bolzano | 4,280.70 mi (6,889.12 km) |
| Potomac to Bomporto | 4,325.56 mi (6,961.32 km) |
| Potomac to Bonate di Sopra | 4,231.56 mi (6,810.03 km) |
| Potomac to Bondeno | 4,336.96 mi (6,979.66 km) |
| Potomac to Bordighera | 4,210.09 mi (6,775.48 km) |
| Potomac to Borgaro Torinese | 4,165.96 mi (6,704.47 km) |
| Potomac to Borgo a Buggiano | 4,341.17 mi (6,986.44 km) |
| Potomac to Borgo San Dalmazzo | 4,184.46 mi (6,734.23 km) |
| Potomac to Borgo San Lorenzo | 4,367.10 mi (7,028.17 km) |
| Potomac to Borgomanero | 4,183.92 mi (6,733.37 km) |
| Potomac to Borgoricco | 4,339.05 mi (6,983.03 km) |
