| Duncan to Bollullos par del Condado | 4,895.26 mi (7,878.17 km) |
| Duncan to Bormujos | 4,916.68 mi (7,912.63 km) |
| Duncan to Brenes | 4,919.97 mi (7,917.92 km) |
| Duncan to Brunete | 4,910.06 mi (7,901.98 km) |
| Duncan to Bueu | 4,628.63 mi (7,449.05 km) |
| Duncan to Bullas | 5,099.73 mi (8,207.22 km) |
| Duncan to Bunol | 5,090.63 mi (8,192.57 km) |
| Duncan to Burela de Cabo | 4,649.82 mi (7,483.17 km) |
| Duncan to Burgos | 4,857.37 mi (7,817.18 km) |
| Duncan to Burjasot | 5,104.89 mi (8,215.53 km) |
| Duncan to Burriana | 5,105.13 mi (8,215.92 km) |
| Duncan to Cabanaquinta | 4,748.32 mi (7,641.67 km) |
| Duncan to Cabanillas del Campo | 4,936.41 mi (7,944.39 km) |
| Duncan to Cabra | 4,990.92 mi (8,032.10 km) |
| Duncan to Caceres | 4,831.25 mi (7,775.14 km) |
