| South Portland to Berkeley (California) | 2,705.19 mi (4,353.58 km) |
| South Portland to Berkley (Colorado) | 1,797.62 mi (2,893.00 km) |
| South Portland to Berkley (Michigan) | 654.97 mi (1,054.07 km) |
| South Portland to Berthoud (Colorado) | 1,786.80 mi (2,875.58 km) |
| South Portland to Berwick (Pennsylvania) | 352.43 mi (567.18 km) |
| South Portland to Berwyn (Illinois) | 894.99 mi (1,440.34 km) |
| South Portland to Bessemer (Alabama) | 1,143.57 mi (1,840.40 km) |
| South Portland to Bethany (Oklahoma) | 1,552.41 mi (2,498.37 km) |
| South Portland to Bethany (Oregon) | 2,541.96 mi (4,090.89 km) |
| South Portland to Bethel Park (Pennsylvania) | 549.86 mi (884.92 km) |
| South Portland to Bethesda (Maryland) | 477.82 mi (768.98 km) |
| South Portland to Bethlehem (Pennsylvania) | 332.77 mi (535.54 km) |
| South Portland to Bethpage (New York) | 257.65 mi (414.65 km) |
| South Portland to Bettendorf (Iowa) | 1,033.98 mi (1,664.02 km) |
| South Portland to Beverly (Massachusetts) | 78.93 mi (127.02 km) |
