| Gaithersburg to Brownhills | 3,564.52 mi (5,736.54 km) |
| Gaithersburg to Broxbourne | 3,660.51 mi (5,891.01 km) |
| Gaithersburg to Broxburn | 3,445.94 mi (5,545.70 km) |
| Gaithersburg to Bryn | 3,519.22 mi (5,663.64 km) |
| Gaithersburg to Buckhurst Hill | 3,665.45 mi (5,898.97 km) |
| Gaithersburg to Buckie | 3,438.37 mi (5,533.53 km) |
| Gaithersburg to Buckingham | 3,616.12 mi (5,819.58 km) |
| Gaithersburg to Buckley | 3,508.27 mi (5,646.01 km) |
| Gaithersburg to Bucksburn | 3,474.55 mi (5,591.75 km) |
| Gaithersburg to Bude | 3,493.63 mi (5,622.46 km) |
| Gaithersburg to Bulwell | 3,586.82 mi (5,772.43 km) |
| Gaithersburg to Burbage | 3,590.40 mi (5,778.20 km) |
| Gaithersburg to Burgess Hill | 3,674.08 mi (5,912.86 km) |
| Gaithersburg to Burnham | 3,639.16 mi (5,856.67 km) |
| Gaithersburg to Burnham-on-Sea | 3,549.75 mi (5,712.77 km) |
