| South Portland to Apatin | 4,145.71 mi (6,671.88 km) |
| South Portland to Arandelovac | 4,262.08 mi (6,859.15 km) |
| South Portland to Arilje | 4,264.96 mi (6,863.79 km) |
| South Portland to Babusnica | 4,387.12 mi (7,060.38 km) |
| South Portland to Bac | 4,166.60 mi (6,705.49 km) |
| South Portland to Backa Palanka | 4,178.44 mi (6,724.56 km) |
| South Portland to Backa Topola | 4,166.15 mi (6,704.78 km) |
| South Portland to Backi Petrovac | 4,181.95 mi (6,730.19 km) |
| South Portland to Bajina Basta | 4,234.35 mi (6,814.53 km) |
| South Portland to Batajnica | 4,227.53 mi (6,803.56 km) |
| South Portland to Batocina | 4,289.58 mi (6,903.42 km) |
| South Portland to Becej | 4,189.88 mi (6,742.95 km) |
| South Portland to Bela Crkva | 4,273.47 mi (6,877.49 km) |
| South Portland to Bela Palanka | 4,376.75 mi (7,043.70 km) |
| South Portland to Belgrade | 4,237.96 mi (6,820.34 km) |
