| Potomac to Beltsville (Maryland) | 14.77 mi (23.77 km) |
| Potomac to Belvedere Park (Georgia) | 535.22 mi (861.36 km) |
| Potomac to Belvidere (Illinois) | 650.93 mi (1,047.57 km) |
| Potomac to Bemidji (Minnesota) | 1,061.29 mi (1,707.97 km) |
| Potomac to Benbrook (Texas) | 1,213.38 mi (1,952.75 km) |
| Potomac to Bend (Oregon) | 2,280.36 mi (3,669.89 km) |
| Potomac to Benicia (California) | 2,405.31 mi (3,870.97 km) |
| Potomac to Bensenville (Illinois) | 599.89 mi (965.43 km) |
| Potomac to Bensville (Maryland) | 29.18 mi (46.96 km) |
| Potomac to Benton (Arkansas) | 902.92 mi (1,453.10 km) |
| Potomac to Bentonville (Arkansas) | 947.99 mi (1,525.64 km) |
| Potomac to Berea (Kentucky) | 396.98 mi (638.88 km) |
| Potomac to Berea (Ohio) | 295.29 mi (475.22 km) |
| Potomac to Berea (South Carolina) | 407.63 mi (656.02 km) |
| Potomac to Bergenfield (New Jersey) | 214.56 mi (345.31 km) |
