| Potomac to Ayr | 3,414.45 mi (5,495.03 km) |
| Potomac to Bacup | 3,538.38 mi (5,694.47 km) |
| Potomac to Baguley | 3,541.06 mi (5,698.78 km) |
| Potomac to Baildon | 3,552.75 mi (5,717.60 km) |
| Potomac to Bailleston | 3,428.16 mi (5,517.08 km) |
| Potomac to Balderton | 3,607.43 mi (5,805.60 km) |
| Potomac to Baldock | 3,653.13 mi (5,879.15 km) |
| Potomac to Balham | 3,666.62 mi (5,900.86 km) |
| Potomac to Bamber Bridge | 3,519.74 mi (5,664.48 km) |
| Potomac to Banbridge | 3,367.79 mi (5,419.93 km) |
| Potomac to Banbury | 3,605.26 mi (5,802.10 km) |
| Potomac to Bangor | 3,386.19 mi (5,449.55 km) |
| Potomac to Bangor | 3,470.44 mi (5,585.13 km) |
| Potomac to Banstead | 3,667.21 mi (5,901.81 km) |
| Potomac to Bargoed | 3,535.09 mi (5,689.18 km) |
