| Mountain Ash to Bailey's Crossroads (Virginia) | 3,534.33 mi (5,687.95 km) |
| Mountain Ash to Bainbridge (Georgia) | 4,216.47 mi (6,785.75 km) |
| Mountain Ash to Bainbridge Island (Washington) | 4,691.50 mi (7,550.24 km) |
| Mountain Ash to Baker (Louisiana) | 4,503.06 mi (7,246.98 km) |
| Mountain Ash to Bakersfield (California) | 5,279.28 mi (8,496.18 km) |
| Mountain Ash to Balch Springs (Texas) | 4,612.44 mi (7,423.00 km) |
| Mountain Ash to Baldwin (New York) | 3,310.56 mi (5,327.83 km) |
| Mountain Ash to Baldwin (Pennsylvania) | 3,582.34 mi (5,765.22 km) |
| Mountain Ash to Baldwin Park (California) | 5,316.11 mi (8,555.45 km) |
| Mountain Ash to Ballenger Creek (Maryland) | 3,522.55 mi (5,669.00 km) |
| Mountain Ash to Ballwin (Missouri) | 4,084.31 mi (6,573.07 km) |
| Mountain Ash to Baltimore (Maryland) | 3,492.81 mi (5,621.14 km) |
| Mountain Ash to Bangor (Maine) | 2,943.26 mi (4,736.72 km) |
| Mountain Ash to Banning (California) | 5,288.06 mi (8,510.30 km) |
| Mountain Ash to Baraboo (Wisconsin) | 3,825.36 mi (6,156.33 km) |
