| South Portland to Bridgeport (Connecticut) | 224.42 mi (361.17 km) |
| South Portland to Bridgeton (Missouri) | 1,096.31 mi (1,764.33 km) |
| South Portland to Bridgetown (Ohio) | 803.99 mi (1,293.90 km) |
| South Portland to Bridgeview (Illinois) | 897.50 mi (1,444.39 km) |
| South Portland to Brigham City (Utah) | 2,107.41 mi (3,391.55 km) |
| South Portland to Brighton (Colorado) | 1,782.16 mi (2,868.11 km) |
| South Portland to Bristol (Connecticut) | 190.50 mi (306.58 km) |
| South Portland to Bristol (Tennessee) | 796.27 mi (1,281.47 km) |
| South Portland to Bristol (Virginia) | 791.20 mi (1,273.31 km) |
| South Portland to Broadlands (Virginia) | 491.87 mi (791.59 km) |
| South Portland to Broadview Heights (Ohio) | 601.38 mi (967.83 km) |
| South Portland to Brock Hall (Maryland) | 469.98 mi (756.36 km) |
| South Portland to Brockton (Massachusetts) | 113.30 mi (182.34 km) |
| South Portland to Broken Arrow (Oklahoma) | 1,443.48 mi (2,323.06 km) |
| South Portland to Bronx (New York) | 265.26 mi (426.90 km) |
