| Potomac to Baraboo (Wisconsin) | 719.72 mi (1,158.27 km) |
| Potomac to Barberton (Ohio) | 270.98 mi (436.09 km) |
| Potomac to Bardstown (Kentucky) | 454.61 mi (731.62 km) |
| Potomac to Barrington (Illinois) | 612.77 mi (986.15 km) |
| Potomac to Barstow (California) | 2,201.75 mi (3,543.38 km) |
| Potomac to Bartlesville (Oklahoma) | 1,032.81 mi (1,662.15 km) |
| Potomac to Bartlett (Illinois) | 613.30 mi (987.01 km) |
| Potomac to Bartlett (Tennessee) | 742.15 mi (1,194.38 km) |
| Potomac to Bartow (Florida) | 813.46 mi (1,309.13 km) |
| Potomac to Batavia (Illinois) | 616.02 mi (991.39 km) |
| Potomac to Batavia (New York) | 280.06 mi (450.71 km) |
| Potomac to Batesville (Arkansas) | 822.15 mi (1,323.12 km) |
| Potomac to Baton Rouge (Louisiana) | 986.53 mi (1,587.67 km) |
| Potomac to Battle Creek (Michigan) | 478.13 mi (769.48 km) |
| Potomac to Battle Ground (Washington) | 2,328.18 mi (3,746.85 km) |
