| Castelnaudary to Blue Springs (Missouri) | 4,715.65 mi (7,589.10 km) |
| Castelnaudary to Bluffdale (Utah) | 5,335.56 mi (8,586.75 km) |
| Castelnaudary to Bluffton (Indiana) | 4,257.22 mi (6,851.33 km) |
| Castelnaudary to Bluffton (South Carolina) | 4,406.17 mi (7,091.05 km) |
| Castelnaudary to Blythe (California) | 5,786.63 mi (9,312.67 km) |
| Castelnaudary to Blytheville (Arkansas) | 4,660.38 mi (7,500.16 km) |
| Castelnaudary to Boca Raton (Florida) | 4,611.76 mi (7,421.92 km) |
| Castelnaudary to Boerne (Texas) | 5,325.13 mi (8,569.97 km) |
| Castelnaudary to Bogalusa (Louisiana) | 4,881.72 mi (7,856.37 km) |
| Castelnaudary to Boiling Springs (South Carolina) | 4,339.90 mi (6,984.39 km) |
| Castelnaudary to Boise (Idaho) | 5,322.96 mi (8,566.48 km) |
| Castelnaudary to Bolingbrook (Illinois) | 4,345.01 mi (6,992.62 km) |
| Castelnaudary to Bolivar (Missouri) | 4,740.60 mi (7,629.26 km) |
| Castelnaudary to Bon Air (Virginia) | 4,040.89 mi (6,503.18 km) |
| Castelnaudary to Bonham (Texas) | 5,038.41 mi (8,108.54 km) |
