| Potomac to Beeville (Texas) | 1,385.28 mi (2,229.39 km) |
| Potomac to Bel Air (Maryland) | 57.90 mi (93.19 km) |
| Potomac to Bel Air North (Maryland) | 57.63 mi (92.75 km) |
| Potomac to Bel Air South (Maryland) | 58.04 mi (93.41 km) |
| Potomac to Belgrade (Montana) | 1,780.93 mi (2,866.12 km) |
| Potomac to Bell (California) | 2,283.44 mi (3,674.84 km) |
| Potomac to Bell Gardens (California) | 2,282.45 mi (3,673.25 km) |
| Potomac to Bella Vista (Arkansas) | 947.99 mi (1,525.65 km) |
| Potomac to Bellair-Meadowbrook Terrace (Florida) | 662.59 mi (1,066.34 km) |
| Potomac to Bellaire (Texas) | 1,220.97 mi (1,964.95 km) |
| Potomac to Belle Chasse (Louisiana) | 964.29 mi (1,551.88 km) |
| Potomac to Belle Glade (Florida) | 874.71 mi (1,407.72 km) |
| Potomac to Bellefontaine (Ohio) | 361.37 mi (581.57 km) |
| Potomac to Bellefontaine Neighbors (Missouri) | 700.64 mi (1,127.57 km) |
| Potomac to Belleville (Illinois) | 689.63 mi (1,109.86 km) |
