| Gaithersburg to Belper | 3,575.20 mi (5,753.73 km) |
| Gaithersburg to Bentley | 3,577.92 mi (5,758.11 km) |
| Gaithersburg to Berkhampstead | 3,638.44 mi (5,855.50 km) |
| Gaithersburg to Berwick-Upon-Tweed | 3,503.97 mi (5,639.09 km) |
| Gaithersburg to Beverley | 3,600.15 mi (5,793.89 km) |
| Gaithersburg to Bewdley | 3,554.54 mi (5,720.49 km) |
| Gaithersburg to Bexleyheath | 3,673.47 mi (5,911.87 km) |
| Gaithersburg to Bicester | 3,611.49 mi (5,812.13 km) |
| Gaithersburg to Bickenhill | 3,577.07 mi (5,756.73 km) |
| Gaithersburg to Bickley | 3,671.06 mi (5,908.01 km) |
| Gaithersburg to Biddulph | 3,545.75 mi (5,706.34 km) |
| Gaithersburg to Bideford | 3,503.76 mi (5,638.76 km) |
| Gaithersburg to Bidston | 3,504.33 mi (5,639.68 km) |
| Gaithersburg to Biggleswade | 3,643.68 mi (5,863.94 km) |
| Gaithersburg to Billericay | 3,681.05 mi (5,924.08 km) |
