| Rockville to Bicaz | 4,849.64 mi (7,804.74 km) |
| Rockville to Bistrita | 4,780.01 mi (7,692.69 km) |
| Rockville to Blaj | 4,795.91 mi (7,718.27 km) |
| Rockville to Bocsa | 4,740.71 mi (7,629.44 km) |
| Rockville to Boldesti-Scaeni | 4,925.17 mi (7,926.30 km) |
| Rockville to Bolintin Vale | 4,938.76 mi (7,948.16 km) |
| Rockville to Borsa | 4,765.25 mi (7,668.94 km) |
| Rockville to Botosani | 4,836.84 mi (7,784.15 km) |
| Rockville to Brad | 4,753.77 mi (7,650.46 km) |
| Rockville to Bragadiru | 4,950.51 mi (7,967.08 km) |
| Rockville to Braila | 4,989.53 mi (8,029.87 km) |
| Rockville to Brasov | 4,882.73 mi (7,857.99 km) |
| Rockville to Breaza | 4,904.31 mi (7,892.72 km) |
| Rockville to Bucharest | 4,953.00 mi (7,971.09 km) |
| Rockville to Buftea | 4,941.22 mi (7,952.12 km) |
