| Irthlingborough to Bilecik | 1,668.87 mi (2,685.78 km) |
| Irthlingborough to Bingol | 2,156.25 mi (3,470.15 km) |
| Irthlingborough to Birecik | 2,135.48 mi (3,436.72 km) |
| Irthlingborough to Bitlis | 2,244.61 mi (3,612.36 km) |
| Irthlingborough to Bodrum | 1,717.44 mi (2,763.96 km) |
| Irthlingborough to Bogazliyan | 1,925.16 mi (3,098.24 km) |
| Irthlingborough to Bolu | 1,708.69 mi (2,749.87 km) |
| Irthlingborough to Bolvadin | 1,776.92 mi (2,859.68 km) |
| Irthlingborough to Bor | 1,956.89 mi (3,149.31 km) |
| Irthlingborough to Borcka | 2,101.65 mi (3,382.28 km) |
| Irthlingborough to Boyabat | 1,808.14 mi (2,909.92 km) |
| Irthlingborough to Bozdogan | 1,719.54 mi (2,767.33 km) |
| Irthlingborough to Bozkir | 1,896.66 mi (3,052.39 km) |
| Irthlingborough to Bozkurt | 1,763.09 mi (2,837.42 km) |
| Irthlingborough to Bozuyuk | 1,681.77 mi (2,706.55 km) |
