| Potomac to Buena Park (California) | 2,277.09 mi (3,664.63 km) |
| Potomac to Buenaventura Lakes (Florida) | 775.40 mi (1,247.89 km) |
| Potomac to Buffalo (Minnesota) | 952.43 mi (1,532.79 km) |
| Potomac to Buffalo (New York) | 282.13 mi (454.04 km) |
| Potomac to Buffalo Grove (Illinois) | 604.95 mi (973.57 km) |
| Potomac to Buford (Georgia) | 506.28 mi (814.78 km) |
| Potomac to Bull Run (Virginia) | 23.85 mi (38.38 km) |
| Potomac to Bullhead City (Arizona) | 2,062.21 mi (3,318.81 km) |
| Potomac to Burbank (California) | 2,286.05 mi (3,679.05 km) |
| Potomac to Burbank (Illinois) | 587.19 mi (944.99 km) |
| Potomac to Burien (Washington) | 2,311.26 mi (3,719.62 km) |
| Potomac to Burkburnett (Texas) | 1,231.21 mi (1,981.43 km) |
| Potomac to Burke (Virginia) | 16.78 mi (27.00 km) |
| Potomac to Burke Centre (Virginia) | 16.47 mi (26.51 km) |
| Potomac to Burleson (Texas) | 1,211.78 mi (1,950.18 km) |
