| Boadilla del Monte to Bicaz | 1,553.07 mi (2,499.43 km) |
| Boadilla del Monte to Bistrita | 1,480.50 mi (2,382.64 km) |
| Boadilla del Monte to Blaj | 1,444.94 mi (2,325.41 km) |
| Boadilla del Monte to Bocsa | 1,333.61 mi (2,146.24 km) |
| Boadilla del Monte to Boldesti-Scaeni | 1,541.99 mi (2,481.60 km) |
| Boadilla del Monte to Bolintin Vale | 1,528.10 mi (2,459.23 km) |
| Boadilla del Monte to Borsa | 1,493.35 mi (2,403.31 km) |
| Boadilla del Monte to Botosani | 1,586.61 mi (2,553.40 km) |
| Boadilla del Monte to Brad | 1,391.11 mi (2,238.77 km) |
| Boadilla del Monte to Bragadiru | 1,538.85 mi (2,476.54 km) |
| Boadilla del Monte to Braila | 1,636.17 mi (2,633.16 km) |
| Boadilla del Monte to Brasov | 1,523.69 mi (2,452.14 km) |
| Boadilla del Monte to Breaza | 1,524.38 mi (2,453.26 km) |
| Boadilla del Monte to Bucharest | 1,545.20 mi (2,486.76 km) |
| Boadilla del Monte to Buftea | 1,537.63 mi (2,474.57 km) |
