| Potomac to Belper | 3,580.03 mi (5,761.51 km) |
| Potomac to Bentley | 3,582.84 mi (5,766.03 km) |
| Potomac to Berkhampstead | 3,643.11 mi (5,863.03 km) |
| Potomac to Berwick-Upon-Tweed | 3,509.19 mi (5,647.49 km) |
| Potomac to Beverley | 3,605.13 mi (5,801.90 km) |
| Potomac to Bewdley | 3,559.26 mi (5,728.08 km) |
| Potomac to Bexleyheath | 3,678.12 mi (5,919.36 km) |
| Potomac to Bicester | 3,616.17 mi (5,819.66 km) |
| Potomac to Bickenhill | 3,581.81 mi (5,764.37 km) |
| Potomac to Bickley | 3,675.70 mi (5,915.48 km) |
| Potomac to Biddulph | 3,550.58 mi (5,714.11 km) |
| Potomac to Bideford | 3,508.22 mi (5,645.93 km) |
| Potomac to Bidston | 3,509.18 mi (5,647.48 km) |
| Potomac to Biggleswade | 3,648.42 mi (5,871.56 km) |
| Potomac to Billericay | 3,685.74 mi (5,931.63 km) |
