| Potomac to Bonhill | 3,409.04 mi (5,486.32 km) |
| Potomac to Bonnyrigg | 3,465.96 mi (5,577.92 km) |
| Potomac to Bootle | 3,511.91 mi (5,651.88 km) |
| Potomac to Borehamwood | 3,657.03 mi (5,885.42 km) |
| Potomac to Boscombe | 3,612.81 mi (5,814.26 km) |
| Potomac to Boston | 3,638.90 mi (5,856.25 km) |
| Potomac to Bottesford | 3,601.41 mi (5,795.90 km) |
| Potomac to Bourne | 3,629.05 mi (5,840.39 km) |
| Potomac to Bournemouth | 3,611.26 mi (5,811.76 km) |
| Potomac to Bournville | 3,573.51 mi (5,751.00 km) |
| Potomac to Bovingdon | 3,644.86 mi (5,865.83 km) |
| Potomac to Bowdon | 3,537.92 mi (5,693.74 km) |
| Potomac to Boxley | 3,698.16 mi (5,951.61 km) |
| Potomac to Brackley | 3,613.52 mi (5,815.40 km) |
| Potomac to Bracknell | 3,642.86 mi (5,862.61 km) |
