| South Portland to Burley (Idaho) | 2,171.16 mi (3,494.15 km) |
| South Portland to Burlingame (California) | 2,718.20 mi (4,374.53 km) |
| South Portland to Burlington (Iowa) | 1,080.83 mi (1,739.43 km) |
| South Portland to Burlington (Kentucky) | 812.31 mi (1,307.28 km) |
| South Portland to Burlington (North Carolina) | 712.92 mi (1,147.34 km) |
| South Portland to Burlington (Vermont) | 157.60 mi (253.64 km) |
| South Portland to Burlington (Wisconsin) | 907.05 mi (1,459.76 km) |
| South Portland to Burnsville (Minnesota) | 1,137.70 mi (1,830.95 km) |
| South Portland to Burr Ridge (Illinois) | 903.03 mi (1,453.28 km) |
| South Portland to Burton (Michigan) | 670.74 mi (1,079.45 km) |
| South Portland to Burtonsville (Maryland) | 464.51 mi (747.56 km) |
| South Portland to Butler (Pennsylvania) | 526.90 mi (847.96 km) |
| South Portland to Butte (Montana) | 2,059.73 mi (3,314.82 km) |
| South Portland to Byram (Mississippi) | 1,340.71 mi (2,157.67 km) |
| South Portland to Cabot (Arkansas) | 1,301.53 mi (2,094.61 km) |
