| Round Rock to Bougival | 5,069.83 mi (8,159.11 km) |
| Round Rock to Bouguenais | 4,966.79 mi (7,993.28 km) |
| Round Rock to Boulogne-Billancourt | 5,074.88 mi (8,167.22 km) |
| Round Rock to Boulogne-sur-Mer | 4,990.20 mi (8,030.95 km) |
| Round Rock to Bourg-de-Peage | 5,318.19 mi (8,558.80 km) |
| Round Rock to Bourg-en-Bresse | 5,284.89 mi (8,505.21 km) |
| Round Rock to Bourg-la-Reine | 5,079.65 mi (8,174.91 km) |
| Round Rock to Bourg-les-Valence | 5,314.82 mi (8,553.38 km) |
| Round Rock to Bourges | 5,138.01 mi (8,268.83 km) |
| Round Rock to Bourgoin-Jallieu | 5,308.38 mi (8,543.01 km) |
| Round Rock to Bressuire | 5,024.98 mi (8,086.92 km) |
| Round Rock to Brest | 4,810.86 mi (7,742.32 km) |
| Round Rock to Bretigny-sur-Orge | 5,084.70 mi (8,183.04 km) |
| Round Rock to Breuillet | 5,080.72 mi (8,176.63 km) |
| Round Rock to Briancon | 5,389.70 mi (8,673.89 km) |
