| Gaithersburg to Bispham | 3,497.60 mi (5,628.85 km) |
| Gaithersburg to Blackburn | 3,521.50 mi (5,667.31 km) |
| Gaithersburg to Blackpool | 3,497.92 mi (5,629.36 km) |
| Gaithersburg to Blairgowrie | 3,440.67 mi (5,537.23 km) |
| Gaithersburg to Blandford Forum | 3,592.02 mi (5,780.80 km) |
| Gaithersburg to Blaydon | 3,528.90 mi (5,679.21 km) |
| Gaithersburg to Bletchley | 3,626.42 mi (5,836.16 km) |
| Gaithersburg to Bloxwich | 3,562.33 mi (5,733.01 km) |
| Gaithersburg to Blunsdon Saint Andrew | 3,591.53 mi (5,780.00 km) |
| Gaithersburg to Blyth | 3,533.78 mi (5,687.08 km) |
| Gaithersburg to Bo'ness | 3,439.45 mi (5,535.26 km) |
| Gaithersburg to Bodmin | 3,493.31 mi (5,621.94 km) |
| Gaithersburg to Bognor Regis | 3,655.26 mi (5,882.58 km) |
| Gaithersburg to Bolsover | 3,578.62 mi (5,759.24 km) |
| Gaithersburg to Bolton | 3,526.76 mi (5,675.77 km) |
