| Llantwit Major to Bonita (California) | 5,372.77 mi (8,646.64 km) |
| Llantwit Major to Bonita Springs (Florida) | 4,325.12 mi (6,960.61 km) |
| Llantwit Major to Bonney Lake (Washington) | 4,719.28 mi (7,594.94 km) |
| Llantwit Major to Boone (Iowa) | 4,052.28 mi (6,521.52 km) |
| Llantwit Major to Boone (North Carolina) | 3,842.74 mi (6,184.30 km) |
| Llantwit Major to Borger (Texas) | 4,650.64 mi (7,484.48 km) |
| Llantwit Major to Bossier City (Louisiana) | 4,509.28 mi (7,256.98 km) |
| Llantwit Major to Boston (Massachusetts) | 3,138.26 mi (5,050.54 km) |
| Llantwit Major to Bostonia (California) | 5,361.38 mi (8,628.31 km) |
| Llantwit Major to Bothell (Washington) | 4,687.06 mi (7,543.09 km) |
| Llantwit Major to Bothell East (Washington) | 4,684.68 mi (7,539.26 km) |
| Llantwit Major to Bothell West (Washington) | 4,686.25 mi (7,541.79 km) |
| Llantwit Major to Boulder (Colorado) | 4,567.01 mi (7,349.89 km) |
| Llantwit Major to Boulder City (Nevada) | 5,124.92 mi (8,247.76 km) |
| Llantwit Major to Bound Brook (New Jersey) | 3,353.88 mi (5,397.55 km) |
