| South Portland to Beeville (Texas) | 1,846.55 mi (2,971.74 km) |
| South Portland to Bel Air (Maryland) | 421.78 mi (678.78 km) |
| South Portland to Bel Air North (Maryland) | 421.88 mi (678.95 km) |
| South Portland to Bel Air South (Maryland) | 422.02 mi (679.18 km) |
| South Portland to Belgrade (Montana) | 1,991.22 mi (3,204.56 km) |
| South Portland to Bell (California) | 2,624.88 mi (4,224.34 km) |
| South Portland to Bell Gardens (California) | 2,624.11 mi (4,223.09 km) |
| South Portland to Bella Vista (Arkansas) | 1,355.53 mi (2,181.52 km) |
| South Portland to Bellair-Meadowbrook Terrace (Florida) | 1,121.78 mi (1,805.33 km) |
| South Portland to Bellaire (Texas) | 1,683.83 mi (2,709.87 km) |
| South Portland to Belle Chasse (Louisiana) | 1,441.42 mi (2,319.75 km) |
| South Portland to Belle Glade (Florida) | 1,306.44 mi (2,102.51 km) |
| South Portland to Bellefontaine (Ohio) | 726.78 mi (1,169.64 km) |
| South Portland to Bellefontaine Neighbors (Missouri) | 1,086.93 mi (1,749.24 km) |
| South Portland to Belleville (Illinois) | 1,082.15 mi (1,741.55 km) |
