| Potomac to Bixby (Oklahoma) | 1,044.13 mi (1,680.37 km) |
| Potomac to Black Forest (Colorado) | 1,469.15 mi (2,364.36 km) |
| Potomac to Blackfoot (Idaho) | 1,838.90 mi (2,959.43 km) |
| Potomac to Blackhawk (California) | 2,397.35 mi (3,858.17 km) |
| Potomac to Blacksburg (Virginia) | 214.66 mi (345.46 km) |
| Potomac to Blackwells Mills (New Jersey) | 171.02 mi (275.22 km) |
| Potomac to Blaine (Minnesota) | 922.38 mi (1,484.42 km) |
| Potomac to Bloomingdale (Florida) | 822.63 mi (1,323.89 km) |
| Potomac to Bloomingdale (Illinois) | 606.91 mi (976.73 km) |
| Potomac to Bloomington (California) | 2,239.79 mi (3,604.60 km) |
| Potomac to Bloomington (Illinois) | 633.21 mi (1,019.05 km) |
| Potomac to Bloomington (Indiana) | 500.31 mi (805.17 km) |
| Potomac to Bloomington (Minnesota) | 918.85 mi (1,478.75 km) |
| Potomac to Bloomsburg (Pennsylvania) | 142.84 mi (229.88 km) |
| Potomac to Blue Ash (Ohio) | 385.51 mi (620.41 km) |
