| Castelo Branco to Blue Springs (Missouri) | 4,429.38 mi (7,128.40 km) |
| Castelo Branco to Bluffdale (Utah) | 5,136.25 mi (8,266.00 km) |
| Castelo Branco to Bluffton (Indiana) | 3,950.01 mi (6,356.92 km) |
| Castelo Branco to Bluffton (South Carolina) | 4,022.60 mi (6,473.76 km) |
| Castelo Branco to Blythe (California) | 5,557.05 mi (8,943.22 km) |
| Castelo Branco to Blytheville (Arkansas) | 4,335.20 mi (6,976.83 km) |
| Castelo Branco to Boca Raton (Florida) | 4,190.45 mi (6,743.87 km) |
| Castelo Branco to Boerne (Texas) | 4,996.50 mi (8,041.08 km) |
| Castelo Branco to Bogalusa (Louisiana) | 4,522.57 mi (7,278.38 km) |
| Castelo Branco to Boiling Springs (South Carolina) | 3,979.07 mi (6,403.70 km) |
| Castelo Branco to Boise (Idaho) | 5,164.96 mi (8,312.21 km) |
| Castelo Branco to Bolingbrook (Illinois) | 4,055.65 mi (6,526.94 km) |
| Castelo Branco to Bolivar (Missouri) | 4,440.89 mi (7,146.93 km) |
| Castelo Branco to Bon Air (Virginia) | 3,682.65 mi (5,926.66 km) |
| Castelo Branco to Bonham (Texas) | 4,722.80 mi (7,600.62 km) |
