| Castelo Branco to Brownsburg (Indiana) | 4,035.45 mi (6,494.43 km) |
| Castelo Branco to Brownsville (Florida) | 4,218.19 mi (6,788.52 km) |
| Castelo Branco to Brownsville (Texas) | 5,090.04 mi (8,191.63 km) |
| Castelo Branco to Brownwood (Texas) | 4,929.92 mi (7,933.94 km) |
| Castelo Branco to Brunswick (Georgia) | 4,087.46 mi (6,578.14 km) |
| Castelo Branco to Brunswick (Ohio) | 3,777.47 mi (6,079.25 km) |
| Castelo Branco to Brushy Creek (Texas) | 4,919.04 mi (7,916.43 km) |
| Castelo Branco to Bryan (Texas) | 4,847.20 mi (7,800.81 km) |
| Castelo Branco to Bryant (Arkansas) | 4,507.13 mi (7,253.52 km) |
| Castelo Branco to Bryn Mawr-Skyway (Washington) | 5,198.18 mi (8,365.67 km) |
| Castelo Branco to Buckeye (Arizona) | 5,480.44 mi (8,819.91 km) |
| Castelo Branco to Buckhall (Virginia) | 3,640.95 mi (5,859.55 km) |
| Castelo Branco to Bucyrus (Ohio) | 3,844.79 mi (6,187.59 km) |
| Castelo Branco to Buda (Texas) | 4,942.05 mi (7,953.46 km) |
| Castelo Branco to Buena Park (California) | 5,689.05 mi (9,155.64 km) |
