| Irthlingborough to Brownsburg (Indiana) | 3,952.56 mi (6,361.03 km) |
| Irthlingborough to Brownsville (Florida) | 4,398.03 mi (7,077.94 km) |
| Irthlingborough to Brownsville (Texas) | 5,088.88 mi (8,189.76 km) |
| Irthlingborough to Brownwood (Texas) | 4,843.23 mi (7,794.42 km) |
| Irthlingborough to Brunswick (Georgia) | 4,180.05 mi (6,727.14 km) |
| Irthlingborough to Brunswick (Ohio) | 3,709.98 mi (5,970.64 km) |
| Irthlingborough to Brushy Creek (Texas) | 4,859.55 mi (7,820.68 km) |
| Irthlingborough to Bryan (Texas) | 4,799.29 mi (7,723.71 km) |
| Irthlingborough to Bryant (Arkansas) | 4,445.02 mi (7,153.57 km) |
| Irthlingborough to Bryn Mawr-Skyway (Washington) | 4,731.01 mi (7,613.83 km) |
| Irthlingborough to Buckeye (Arizona) | 5,239.58 mi (8,432.29 km) |
| Irthlingborough to Buckhall (Virginia) | 3,652.40 mi (5,877.98 km) |
| Irthlingborough to Bucyrus (Ohio) | 3,775.08 mi (6,075.40 km) |
| Irthlingborough to Buda (Texas) | 4,886.89 mi (7,864.69 km) |
| Irthlingborough to Buena Park (California) | 5,391.14 mi (8,676.21 km) |
