| Belfast to Bougival | 524.75 mi (844.50 km) |
| Belfast to Bouguenais | 545.66 mi (878.15 km) |
| Belfast to Boulogne-Billancourt | 529.21 mi (851.69 km) |
| Belfast to Boulogne-sur-Mer | 413.69 mi (665.77 km) |
| Belfast to Bourg-de-Peage | 820.04 mi (1,319.72 km) |
| Belfast to Bourg-en-Bresse | 758.19 mi (1,220.19 km) |
| Belfast to Bourg-la-Reine | 534.32 mi (859.91 km) |
| Belfast to Bourg-les-Valence | 821.29 mi (1,321.74 km) |
| Belfast to Bourges | 632.60 mi (1,018.08 km) |
| Belfast to Bourgoin-Jallieu | 794.39 mi (1,278.45 km) |
| Belfast to Bressuire | 585.97 mi (943.03 km) |
| Belfast to Brest | 433.25 mi (697.24 km) |
| Belfast to Bretigny-sur-Orge | 543.26 mi (874.29 km) |
| Belfast to Breuillet | 542.05 mi (872.35 km) |
| Belfast to Briancon | 871.37 mi (1,402.34 km) |
