| Gaithersburg to Barking | 3,669.29 mi (5,905.15 km) |
| Gaithersburg to Barnet | 3,655.60 mi (5,883.12 km) |
| Gaithersburg to Barnoldswick | 3,529.89 mi (5,680.81 km) |
| Gaithersburg to Barnsley | 3,564.66 mi (5,736.77 km) |
| Gaithersburg to Barnstaple | 3,508.70 mi (5,646.70 km) |
| Gaithersburg to Barrhead | 3,413.28 mi (5,493.15 km) |
| Gaithersburg to Barri | 3,534.95 mi (5,688.95 km) |
| Gaithersburg to Barrow in Furness | 3,485.73 mi (5,609.74 km) |
| Gaithersburg to Barton upon Humber | 3,602.51 mi (5,797.68 km) |
| Gaithersburg to Barton upon Irwell | 3,531.41 mi (5,683.25 km) |
| Gaithersburg to Barwell | 3,589.66 mi (5,777.00 km) |
| Gaithersburg to Basford | 3,588.40 mi (5,774.97 km) |
| Gaithersburg to Basildon | 3,685.04 mi (5,930.50 km) |
| Gaithersburg to Basingstoke | 3,627.63 mi (5,838.10 km) |
| Gaithersburg to Bath | 3,572.94 mi (5,750.10 km) |
