| Potomac to Blue Island (Illinois) | 581.28 mi (935.48 km) |
| Potomac to Blue Springs (Missouri) | 915.48 mi (1,473.32 km) |
| Potomac to Bluffdale (Utah) | 1,836.63 mi (2,955.78 km) |
| Potomac to Bluffton (Indiana) | 439.40 mi (707.15 km) |
| Potomac to Bluffton (South Carolina) | 514.50 mi (828.02 km) |
| Potomac to Blythe (California) | 2,101.43 mi (3,381.93 km) |
| Potomac to Blytheville (Arkansas) | 728.07 mi (1,171.72 km) |
| Potomac to Boca Raton (Florida) | 889.40 mi (1,431.35 km) |
| Potomac to Boerne (Texas) | 1,378.53 mi (2,218.53 km) |
| Potomac to Bogalusa (Louisiana) | 914.40 mi (1,471.59 km) |
| Potomac to Boiling Springs (South Carolina) | 380.44 mi (612.27 km) |
| Potomac to Boise (Idaho) | 2,031.63 mi (3,269.58 km) |
| Potomac to Bolingbrook (Illinois) | 602.87 mi (970.22 km) |
| Potomac to Bolivar (Missouri) | 883.72 mi (1,422.21 km) |
| Potomac to Bon Air (Virginia) | 105.33 mi (169.51 km) |
