| Irthlingborough to Bucak | 1,818.62 mi (2,926.79 km) |
| Irthlingborough to Buharkent | 1,722.08 mi (2,771.42 km) |
| Irthlingborough to Bulancak | 1,974.48 mi (3,177.61 km) |
| Irthlingborough to Bulanik | 2,221.01 mi (3,574.37 km) |
| Irthlingborough to Buldan | 1,721.47 mi (2,770.43 km) |
| Irthlingborough to Bunyan | 1,965.67 mi (3,163.43 km) |
| Irthlingborough to Burdur | 1,793.84 mi (2,886.91 km) |
| Irthlingborough to Burhaniye | 1,578.77 mi (2,540.79 km) |
| Irthlingborough to Bursa | 1,629.86 mi (2,623.01 km) |
| Irthlingborough to Buyukcekmece | 1,573.58 mi (2,532.43 km) |
| Irthlingborough to Buyukorhan | 1,644.32 mi (2,646.27 km) |
| Irthlingborough to Buyukyoncali | 1,531.77 mi (2,465.15 km) |
| Irthlingborough to Caglayancerit | 2,074.10 mi (3,337.93 km) |
| Irthlingborough to Cal | 1,741.72 mi (2,803.03 km) |
| Irthlingborough to Caldiran | 2,288.14 mi (3,682.41 km) |
