| Madrid to Bicaz | 1,544.70 mi (2,485.96 km) |
| Madrid to Bistrita | 1,472.19 mi (2,369.26 km) |
| Madrid to Blaj | 1,436.48 mi (2,311.79 km) |
| Madrid to Bocsa | 1,325.05 mi (2,132.46 km) |
| Madrid to Boldesti-Scaeni | 1,533.36 mi (2,467.70 km) |
| Madrid to Bolintin Vale | 1,519.39 mi (2,445.22 km) |
| Madrid to Borsa | 1,485.12 mi (2,390.08 km) |
| Madrid to Botosani | 1,578.36 mi (2,540.13 km) |
| Madrid to Brad | 1,382.65 mi (2,225.16 km) |
| Madrid to Bragadiru | 1,530.13 mi (2,462.51 km) |
| Madrid to Braila | 1,627.56 mi (2,619.30 km) |
| Madrid to Brasov | 1,515.14 mi (2,438.38 km) |
| Madrid to Breaza | 1,515.77 mi (2,439.39 km) |
| Madrid to Bucharest | 1,536.49 mi (2,472.74 km) |
| Madrid to Buftea | 1,528.93 mi (2,460.58 km) |
