| Idar-Oberstein to Bistrita | 806.02 mi (1,297.16 km) |
| Idar-Oberstein to Blaj | 804.31 mi (1,294.41 km) |
| Idar-Oberstein to Bocsa | 733.77 mi (1,180.89 km) |
| Idar-Oberstein to Boldesti-Scaeni | 930.63 mi (1,497.70 km) |
| Idar-Oberstein to Bolintin Vale | 937.84 mi (1,509.31 km) |
| Idar-Oberstein to Borsa | 802.21 mi (1,291.03 km) |
| Idar-Oberstein to Botosani | 889.96 mi (1,432.25 km) |
| Idar-Oberstein to Brad | 756.52 mi (1,217.50 km) |
| Idar-Oberstein to Bragadiru | 949.80 mi (1,528.55 km) |
| Idar-Oberstein to Braila | 1,007.76 mi (1,621.83 km) |
| Idar-Oberstein to Brasov | 893.34 mi (1,437.69 km) |
| Idar-Oberstein to Breaza | 909.72 mi (1,464.05 km) |
| Idar-Oberstein to Bucharest | 953.26 mi (1,534.13 km) |
| Idar-Oberstein to Buftea | 942.03 mi (1,516.04 km) |
| Idar-Oberstein to Buhusi | 913.69 mi (1,470.44 km) |
