| Llantwit Major to Black Forest (Colorado) | 4,596.07 mi (7,396.67 km) |
| Llantwit Major to Blackfoot (Idaho) | 4,641.47 mi (7,469.73 km) |
| Llantwit Major to Blackhawk (California) | 5,240.21 mi (8,433.31 km) |
| Llantwit Major to Blacksburg (Virginia) | 3,744.66 mi (6,026.45 km) |
| Llantwit Major to Blackwells Mills (New Jersey) | 3,360.18 mi (5,407.69 km) |
| Llantwit Major to Blaine (Minnesota) | 3,882.78 mi (6,248.73 km) |
| Llantwit Major to Bloomingdale (Florida) | 4,269.35 mi (6,870.86 km) |
| Llantwit Major to Bloomingdale (Illinois) | 3,836.54 mi (6,174.32 km) |
| Llantwit Major to Bloomington (California) | 5,307.18 mi (8,541.08 km) |
| Llantwit Major to Bloomington (Illinois) | 3,938.42 mi (6,338.28 km) |
| Llantwit Major to Bloomington (Indiana) | 3,902.90 mi (6,281.11 km) |
| Llantwit Major to Bloomington (Minnesota) | 3,902.22 mi (6,280.01 km) |
| Llantwit Major to Bloomsburg (Pennsylvania) | 3,414.21 mi (5,494.64 km) |
| Llantwit Major to Blue Ash (Ohio) | 3,813.38 mi (6,137.04 km) |
| Llantwit Major to Blue Island (Illinois) | 3,833.97 mi (6,170.17 km) |
