| Llantrisant to Black Forest (Colorado) | 4,594.42 mi (7,394.00 km) |
| Llantrisant to Blackfoot (Idaho) | 4,638.47 mi (7,464.89 km) |
| Llantrisant to Blackhawk (California) | 5,236.75 mi (8,427.73 km) |
| Llantrisant to Blacksburg (Virginia) | 3,746.04 mi (6,028.66 km) |
| Llantrisant to Blackwells Mills (New Jersey) | 3,361.65 mi (5,410.06 km) |
| Llantrisant to Blaine (Minnesota) | 3,881.46 mi (6,246.61 km) |
| Llantrisant to Bloomingdale (Florida) | 4,271.91 mi (6,874.98 km) |
| Llantrisant to Bloomingdale (Illinois) | 3,836.29 mi (6,173.91 km) |
| Llantrisant to Bloomington (California) | 5,304.63 mi (8,536.97 km) |
| Llantrisant to Bloomington (Illinois) | 3,938.31 mi (6,338.09 km) |
| Llantrisant to Bloomington (Indiana) | 3,903.27 mi (6,281.70 km) |
| Llantrisant to Bloomington (Minnesota) | 3,900.95 mi (6,277.97 km) |
| Llantrisant to Bloomsburg (Pennsylvania) | 3,415.38 mi (5,496.52 km) |
| Llantrisant to Blue Ash (Ohio) | 3,813.97 mi (6,138.00 km) |
| Llantrisant to Blue Island (Illinois) | 3,833.80 mi (6,169.91 km) |
