| Duncan to Bispham | 4,517.72 mi (7,270.57 km) |
| Duncan to Blackburn | 4,541.39 mi (7,308.67 km) |
| Duncan to Blackpool | 4,518.50 mi (7,271.83 km) |
| Duncan to Blairgowrie | 4,427.64 mi (7,125.60 km) |
| Duncan to Blandford Forum | 4,642.78 mi (7,471.84 km) |
| Duncan to Blaydon | 4,532.32 mi (7,294.07 km) |
| Duncan to Bletchley | 4,661.23 mi (7,501.52 km) |
| Duncan to Bloxwich | 4,593.85 mi (7,393.08 km) |
| Duncan to Blunsdon Saint Andrew | 4,633.37 mi (7,456.70 km) |
| Duncan to Blyth | 4,534.69 mi (7,297.87 km) |
| Duncan to Bo'ness | 4,434.48 mi (7,136.61 km) |
| Duncan to Bodmin | 4,554.72 mi (7,330.12 km) |
| Duncan to Bognor Regis | 4,702.66 mi (7,568.20 km) |
| Duncan to Bolsover | 4,601.28 mi (7,405.04 km) |
| Duncan to Bolton | 4,548.48 mi (7,320.08 km) |
