| Mairena del Aljarafe to Bicaz | 1,760.54 mi (2,833.32 km) |
| Mairena del Aljarafe to Bistrita | 1,690.11 mi (2,719.98 km) |
| Mairena del Aljarafe to Blaj | 1,649.49 mi (2,654.59 km) |
| Mairena del Aljarafe to Bocsa | 1,534.57 mi (2,469.66 km) |
| Mairena del Aljarafe to Boldesti-Scaeni | 1,738.62 mi (2,798.03 km) |
| Mairena del Aljarafe to Bolintin Vale | 1,721.11 mi (2,769.86 km) |
| Mairena del Aljarafe to Borsa | 1,705.61 mi (2,744.92 km) |
| Mairena del Aljarafe to Botosani | 1,798.10 mi (2,893.76 km) |
| Mairena del Aljarafe to Brad | 1,596.12 mi (2,568.70 km) |
| Mairena del Aljarafe to Bragadiru | 1,731.33 mi (2,786.30 km) |
| Mairena del Aljarafe to Braila | 1,833.74 mi (2,951.12 km) |
| Mairena del Aljarafe to Brasov | 1,724.33 mi (2,775.04 km) |
| Mairena del Aljarafe to Breaza | 1,722.09 mi (2,771.44 km) |
| Mairena del Aljarafe to Bucharest | 1,738.04 mi (2,797.11 km) |
| Mairena del Aljarafe to Buftea | 1,731.38 mi (2,786.39 km) |
