| Mountain Ash to Buenaventura Lakes (Florida) | 4,208.93 mi (6,773.62 km) |
| Mountain Ash to Buffalo (Minnesota) | 3,899.62 mi (6,275.83 km) |
| Mountain Ash to Buffalo (New York) | 3,427.40 mi (5,515.87 km) |
| Mountain Ash to Buffalo Grove (Illinois) | 3,817.03 mi (6,142.91 km) |
| Mountain Ash to Buford (Georgia) | 4,035.82 mi (6,495.03 km) |
| Mountain Ash to Bull Run (Virginia) | 3,553.37 mi (5,718.59 km) |
| Mountain Ash to Bullhead City (Arizona) | 5,143.34 mi (8,277.41 km) |
| Mountain Ash to Burbank (California) | 5,321.80 mi (8,564.60 km) |
| Mountain Ash to Burbank (Illinois) | 3,828.91 mi (6,162.04 km) |
| Mountain Ash to Burien (Washington) | 4,695.34 mi (7,556.42 km) |
| Mountain Ash to Burkburnett (Texas) | 4,618.91 mi (7,433.41 km) |
| Mountain Ash to Burke (Virginia) | 3,542.93 mi (5,701.79 km) |
| Mountain Ash to Burke Centre (Virginia) | 3,543.85 mi (5,703.28 km) |
| Mountain Ash to Burleson (Texas) | 4,650.93 mi (7,484.94 km) |
| Mountain Ash to Burley (Idaho) | 4,713.37 mi (7,585.43 km) |
