| Potomac to Berkeley (California) | 2,415.60 mi (3,887.53 km) |
| Potomac to Berkley (Colorado) | 1,480.87 mi (2,383.24 km) |
| Potomac to Berkley (Michigan) | 395.15 mi (635.93 km) |
| Potomac to Berthoud (Colorado) | 1,477.86 mi (2,378.39 km) |
| Potomac to Berwick (Pennsylvania) | 149.64 mi (240.83 km) |
| Potomac to Berwyn (Illinois) | 590.13 mi (949.72 km) |
| Potomac to Bessemer (Alabama) | 669.65 mi (1,077.71 km) |
| Potomac to Bethany (Oklahoma) | 1,147.61 mi (1,846.90 km) |
| Potomac to Bethany (Oregon) | 2,343.75 mi (3,771.89 km) |
| Potomac to Bethel Park (Pennsylvania) | 176.16 mi (283.50 km) |
| Potomac to Bethesda (Maryland) | 4.48 mi (7.21 km) |
| Potomac to Bethlehem (Pennsylvania) | 147.66 mi (237.64 km) |
| Potomac to Bethpage (New York) | 230.28 mi (370.60 km) |
| Potomac to Bettendorf (Iowa) | 721.06 mi (1,160.43 km) |
| Potomac to Beverly (Massachusetts) | 412.11 mi (663.23 km) |
