| Llantrisant to Blue Springs (Missouri) | 4,212.18 mi (6,778.85 km) |
| Llantrisant to Bluffdale (Utah) | 4,770.35 mi (7,677.14 km) |
| Llantrisant to Bluffton (Indiana) | 3,777.26 mi (6,078.91 km) |
| Llantrisant to Bluffton (South Carolina) | 4,003.22 mi (6,442.56 km) |
| Llantrisant to Blythe (California) | 5,234.72 mi (8,424.47 km) |
| Llantrisant to Blytheville (Arkansas) | 4,191.15 mi (6,745.00 km) |
| Llantrisant to Boca Raton (Florida) | 4,255.60 mi (6,848.73 km) |
| Llantrisant to Boerne (Texas) | 4,850.88 mi (7,806.73 km) |
| Llantrisant to Bogalusa (Louisiana) | 4,443.53 mi (7,151.17 km) |
| Llantrisant to Boiling Springs (South Carolina) | 3,911.68 mi (6,295.24 km) |
| Llantrisant to Boise (Idaho) | 4,738.92 mi (7,626.55 km) |
| Llantrisant to Bolingbrook (Illinois) | 3,848.63 mi (6,193.77 km) |
| Llantrisant to Bolivar (Missouri) | 4,247.79 mi (6,836.15 km) |
| Llantrisant to Bon Air (Virginia) | 3,614.98 mi (5,817.75 km) |
| Llantrisant to Bonham (Texas) | 4,555.73 mi (7,331.73 km) |
