| Potomac to Badger (Alaska) | 3,249.01 mi (5,228.77 km) |
| Potomac to Bailey's Crossroads (Virginia) | 12.00 mi (19.31 km) |
| Potomac to Bainbridge (Georgia) | 698.35 mi (1,123.88 km) |
| Potomac to Bainbridge Island (Washington) | 2,320.32 mi (3,734.20 km) |
| Potomac to Baker (Louisiana) | 981.44 mi (1,579.47 km) |
| Potomac to Bakersfield (California) | 2,296.85 mi (3,696.42 km) |
| Potomac to Balch Springs (Texas) | 1,168.18 mi (1,880.00 km) |
| Potomac to Baldwin (New York) | 221.35 mi (356.24 km) |
| Potomac to Baldwin (Pennsylvania) | 174.61 mi (281.01 km) |
| Potomac to Baldwin Park (California) | 2,269.81 mi (3,652.90 km) |
| Potomac to Ballenger Creek (Maryland) | 28.08 mi (45.19 km) |
| Potomac to Ballwin (Missouri) | 719.06 mi (1,157.21 km) |
| Potomac to Baltimore (Maryland) | 37.01 mi (59.56 km) |
| Potomac to Bangor (Maine) | 589.53 mi (948.76 km) |
| Potomac to Banning (California) | 2,215.69 mi (3,565.80 km) |
