| South Portland to Beltsville (Maryland) | 467.70 mi (752.69 km) |
| South Portland to Belvedere Park (Georgia) | 1,014.21 mi (1,632.21 km) |
| South Portland to Belvidere (Illinois) | 942.33 mi (1,516.54 km) |
| South Portland to Bemidji (Minnesota) | 1,213.58 mi (1,953.07 km) |
| South Portland to Benbrook (Texas) | 1,648.53 mi (2,653.05 km) |
| South Portland to Bend (Oregon) | 2,500.79 mi (4,024.64 km) |
| South Portland to Benicia (California) | 2,693.20 mi (4,334.28 km) |
| South Portland to Bensenville (Illinois) | 900.79 mi (1,449.69 km) |
| South Portland to Bensville (Maryland) | 491.87 mi (791.58 km) |
| South Portland to Benton (Arkansas) | 1,342.55 mi (2,160.63 km) |
| South Portland to Bentonville (Arkansas) | 1,357.33 mi (2,184.41 km) |
| South Portland to Berea (Kentucky) | 843.04 mi (1,356.74 km) |
| South Portland to Berea (Ohio) | 609.40 mi (980.73 km) |
| South Portland to Berea (South Carolina) | 887.00 mi (1,427.49 km) |
| South Portland to Bergenfield (New Jersey) | 266.29 mi (428.55 km) |
