| Round Rock to Barking | 4,905.71 mi (7,894.97 km) |
| Round Rock to Barnet | 4,891.77 mi (7,872.54 km) |
| Round Rock to Barnoldswick | 4,751.66 mi (7,647.05 km) |
| Round Rock to Barnsley | 4,788.18 mi (7,705.84 km) |
| Round Rock to Barnstaple | 4,755.53 mi (7,653.29 km) |
| Round Rock to Barrhead | 4,621.84 mi (7,438.12 km) |
| Round Rock to Barri | 4,778.21 mi (7,689.79 km) |
| Round Rock to Barrow in Furness | 4,707.60 mi (7,576.16 km) |
| Round Rock to Barton upon Humber | 4,823.07 mi (7,761.98 km) |
| Round Rock to Barton upon Irwell | 4,757.14 mi (7,655.88 km) |
| Round Rock to Barwell | 4,820.89 mi (7,758.47 km) |
| Round Rock to Basford | 4,816.06 mi (7,750.71 km) |
| Round Rock to Basildon | 4,920.39 mi (7,918.61 km) |
| Round Rock to Basingstoke | 4,868.16 mi (7,834.55 km) |
| Round Rock to Bath | 4,814.87 mi (7,748.78 km) |
