| South Portland to Bay City (Michigan) | 679.57 mi (1,093.66 km) |
| South Portland to Bay City (Texas) | 1,739.46 mi (2,799.39 km) |
| South Portland to Bay Point (California) | 2,684.95 mi (4,321.02 km) |
| South Portland to Bay Shore (New York) | 251.31 mi (404.45 km) |
| South Portland to Bay Village (Ohio) | 610.21 mi (982.04 km) |
| South Portland to Bayamón (Puerto Rico) | 1,761.16 mi (2,834.32 km) |
| South Portland to Bayonet Point (Florida) | 1,261.15 mi (2,029.63 km) |
| South Portland to Bayonne (New Jersey) | 283.42 mi (456.12 km) |
| South Portland to Bayou Blue (Louisiana) | 1,480.14 mi (2,382.06 km) |
| South Portland to Bayou Cane (Louisiana) | 1,483.86 mi (2,388.03 km) |
| South Portland to Bayshore Gardens (Florida) | 1,311.91 mi (2,111.32 km) |
| South Portland to Baytown (Texas) | 1,659.20 mi (2,670.23 km) |
| South Portland to Beach Park (Illinois) | 889.59 mi (1,431.65 km) |
| South Portland to Beachwood (New Jersey) | 325.62 mi (524.03 km) |
| South Portland to Beachwood (Ohio) | 589.32 mi (948.42 km) |
