| Potomac to Brownhills | 3,569.29 mi (5,744.21 km) |
| Potomac to Broxbourne | 3,665.20 mi (5,898.56 km) |
| Potomac to Broxburn | 3,451.15 mi (5,554.09 km) |
| Potomac to Bryn | 3,524.10 mi (5,671.49 km) |
| Potomac to Buckhurst Hill | 3,670.13 mi (5,906.50 km) |
| Potomac to Buckie | 3,443.85 mi (5,542.33 km) |
| Potomac to Buckingham | 3,620.82 mi (5,827.14 km) |
| Potomac to Buckley | 3,513.08 mi (5,653.76 km) |
| Potomac to Bucksburn | 3,479.97 mi (5,600.47 km) |
| Potomac to Bude | 3,498.05 mi (5,629.57 km) |
| Potomac to Bulwell | 3,591.66 mi (5,780.21 km) |
| Potomac to Burbage | 3,595.17 mi (5,785.86 km) |
| Potomac to Burgess Hill | 3,678.65 mi (5,920.21 km) |
| Potomac to Burnham | 3,643.80 mi (5,864.13 km) |
| Potomac to Burnham-on-Sea | 3,554.28 mi (5,720.06 km) |
