| Southborough to Bicaz | 1,199.30 mi (1,930.09 km) |
| Southborough to Bistrita | 1,124.44 mi (1,809.61 km) |
| Southborough to Blaj | 1,127.04 mi (1,813.79 km) |
| Southborough to Bocsa | 1,059.40 mi (1,704.94 km) |
| Southborough to Boldesti-Scaeni | 1,254.36 mi (2,018.70 km) |
| Southborough to Bolintin Vale | 1,262.74 mi (2,032.19 km) |
| Southborough to Borsa | 1,117.72 mi (1,798.80 km) |
| Southborough to Botosani | 1,202.26 mi (1,934.85 km) |
| Southborough to Brad | 1,080.37 mi (1,738.69 km) |
| Southborough to Bragadiru | 1,274.68 mi (2,051.40 km) |
| Southborough to Braila | 1,329.16 mi (2,139.07 km) |
| Southborough to Brasov | 1,215.90 mi (1,956.81 km) |
| Southborough to Breaza | 1,233.41 mi (1,984.98 km) |
| Southborough to Bucharest | 1,277.99 mi (2,056.72 km) |
| Southborough to Buftea | 1,266.64 mi (2,038.47 km) |
