| Mountain Ash to Black Forest (Colorado) | 4,588.91 mi (7,385.13 km) |
| Mountain Ash to Blackfoot (Idaho) | 4,631.95 mi (7,454.40 km) |
| Mountain Ash to Blackhawk (California) | 5,229.90 mi (8,416.70 km) |
| Mountain Ash to Blacksburg (Virginia) | 3,743.06 mi (6,023.88 km) |
| Mountain Ash to Blackwells Mills (New Jersey) | 3,358.77 mi (5,405.42 km) |
| Mountain Ash to Blaine (Minnesota) | 3,876.22 mi (6,238.18 km) |
| Mountain Ash to Bloomingdale (Florida) | 4,270.02 mi (6,871.93 km) |
| Mountain Ash to Bloomingdale (Illinois) | 3,831.90 mi (6,166.85 km) |
| Mountain Ash to Bloomington (California) | 5,298.43 mi (8,527.00 km) |
| Mountain Ash to Bloomington (Illinois) | 3,934.04 mi (6,331.23 km) |
| Mountain Ash to Bloomington (Indiana) | 3,899.41 mi (6,275.49 km) |
| Mountain Ash to Bloomington (Minnesota) | 3,895.74 mi (6,269.59 km) |
| Mountain Ash to Bloomsburg (Pennsylvania) | 3,412.22 mi (5,491.44 km) |
| Mountain Ash to Blue Ash (Ohio) | 3,810.31 mi (6,132.10 km) |
| Mountain Ash to Blue Island (Illinois) | 3,829.49 mi (6,162.97 km) |
