| Potomac to Burnley | 3,534.87 mi (5,688.82 km) |
| Potomac to Burntwood | 3,569.10 mi (5,743.90 km) |
| Potomac to Burscough | 3,514.96 mi (5,656.77 km) |
| Potomac to Burslem | 3,551.36 mi (5,715.36 km) |
| Potomac to Burton upon Trent | 3,578.09 mi (5,758.38 km) |
| Potomac to Burtonwood | 3,525.20 mi (5,673.26 km) |
| Potomac to Bury | 3,536.55 mi (5,691.52 km) |
| Potomac to Bury Saint Edmunds | 3,684.05 mi (5,928.90 km) |
| Potomac to Bushey | 3,653.77 mi (5,880.17 km) |
| Potomac to Buxton | 3,558.21 mi (5,726.38 km) |
| Potomac to Caerdydd | 3,541.71 mi (5,699.84 km) |
| Potomac to Caerfyrddin | 3,487.71 mi (5,612.93 km) |
| Potomac to Caernarfon | 3,466.30 mi (5,578.47 km) |
| Potomac to Caerphilly | 3,538.20 mi (5,694.19 km) |
| Potomac to Caister-on-Sea | 3,715.47 mi (5,979.46 km) |
