| Irthlingborough to Beocin | 1,044.30 mi (1,680.64 km) |
| Irthlingborough to Blace | 1,185.48 mi (1,907.85 km) |
| Irthlingborough to Bogatic | 1,049.35 mi (1,688.76 km) |
| Irthlingborough to Bojnik | 1,214.48 mi (1,954.52 km) |
| Irthlingborough to Boljevac | 1,188.68 mi (1,913.00 km) |
| Irthlingborough to Bor | 1,181.97 mi (1,902.19 km) |
| Irthlingborough to Borca | 1,086.03 mi (1,747.79 km) |
| Irthlingborough to Bosilegrad | 1,266.63 mi (2,038.45 km) |
| Irthlingborough to Brus | 1,171.65 mi (1,885.59 km) |
| Irthlingborough to Bujanovac | 1,240.87 mi (1,996.98 km) |
| Irthlingborough to Cacak | 1,122.99 mi (1,807.28 km) |
| Irthlingborough to Cajetina | 1,104.66 mi (1,777.78 km) |
| Irthlingborough to Cicevac | 1,173.49 mi (1,888.55 km) |
| Irthlingborough to Coka | 1,032.56 mi (1,661.75 km) |
| Irthlingborough to Crna Trava | 1,246.10 mi (2,005.41 km) |
