| Llanelli to Blue Springs (Missouri) | 4,177.61 mi (6,723.21 km) |
| Llanelli to Bluffdale (Utah) | 4,737.95 mi (7,624.99 km) |
| Llanelli to Bluffton (Indiana) | 3,742.30 mi (6,022.65 km) |
| Llanelli to Bluffton (South Carolina) | 3,968.09 mi (6,386.02 km) |
| Llanelli to Blythe (California) | 5,201.71 mi (8,371.35 km) |
| Llanelli to Blytheville (Arkansas) | 4,156.11 mi (6,688.61 km) |
| Llanelli to Boca Raton (Florida) | 4,220.83 mi (6,792.77 km) |
| Llanelli to Boerne (Texas) | 4,815.92 mi (7,750.48 km) |
| Llanelli to Bogalusa (Louisiana) | 4,408.33 mi (7,094.53 km) |
| Llanelli to Boiling Springs (South Carolina) | 3,876.48 mi (6,238.59 km) |
| Llanelli to Boise (Idaho) | 4,707.77 mi (7,576.42 km) |
| Llanelli to Bolingbrook (Illinois) | 3,813.89 mi (6,137.87 km) |
| Llanelli to Bolivar (Missouri) | 4,213.03 mi (6,780.22 km) |
| Llanelli to Bon Air (Virginia) | 3,579.78 mi (5,761.10 km) |
| Llanelli to Bonham (Texas) | 4,520.85 mi (7,275.61 km) |
