| Potomac to Boekel | 3,897.19 mi (6,271.91 km) |
| Potomac to Bolsward | 3,854.41 mi (6,203.07 km) |
| Potomac to Borger | 3,906.70 mi (6,287.23 km) |
| Potomac to Borne | 3,921.44 mi (6,310.94 km) |
| Potomac to Boskoop | 3,844.91 mi (6,187.79 km) |
| Potomac to Boxmeer | 3,907.12 mi (6,287.89 km) |
| Potomac to Boxtel | 3,884.37 mi (6,251.28 km) |
| Potomac to Breda | 3,862.01 mi (6,215.31 km) |
| Potomac to Breukelen | 3,856.16 mi (6,205.89 km) |
| Potomac to Brielle | 3,829.91 mi (6,163.64 km) |
| Potomac to Bronkhorst | 3,904.95 mi (6,284.40 km) |
| Potomac to Brummen | 3,903.64 mi (6,282.30 km) |
| Potomac to Brunssum | 3,926.38 mi (6,318.89 km) |
| Potomac to Bunnik | 3,868.39 mi (6,225.57 km) |
| Potomac to Burgum | 3,869.07 mi (6,226.67 km) |
