| Belfast to Bicaz | 1,481.34 mi (2,383.99 km) |
| Belfast to Bistrita | 1,410.00 mi (2,269.17 km) |
| Belfast to Blaj | 1,423.81 mi (2,291.39 km) |
| Belfast to Bocsa | 1,370.96 mi (2,206.35 km) |
| Belfast to Boldesti-Scaeni | 1,553.04 mi (2,499.37 km) |
| Belfast to Bolintin Vale | 1,566.77 mi (2,521.47 km) |
| Belfast to Borsa | 1,397.30 mi (2,248.74 km) |
| Belfast to Botosani | 1,473.79 mi (2,371.83 km) |
| Belfast to Brad | 1,381.69 mi (2,223.61 km) |
| Belfast to Bragadiru | 1,578.49 mi (2,540.34 km) |
| Belfast to Braila | 1,619.11 mi (2,605.71 km) |
| Belfast to Brasov | 1,510.90 mi (2,431.56 km) |
| Belfast to Breaza | 1,532.16 mi (2,465.77 km) |
| Belfast to Bucharest | 1,580.90 mi (2,544.21 km) |
| Belfast to Buftea | 1,569.09 mi (2,525.21 km) |
