| Harrow on the Hill to Bougival | 216.21 mi (347.96 km) |
| Harrow on the Hill to Bouguenais | 308.66 mi (496.74 km) |
| Harrow on the Hill to Boulogne-Billancourt | 220.29 mi (354.52 km) |
| Harrow on the Hill to Boulogne-sur-Mer | 102.40 mi (164.79 km) |
| Harrow on the Hill to Bourg-de-Peage | 514.08 mi (827.34 km) |
| Harrow on the Hill to Bourg-en-Bresse | 448.04 mi (721.04 km) |
| Harrow on the Hill to Bourg-la-Reine | 225.31 mi (362.60 km) |
| Harrow on the Hill to Bourg-les-Valence | 516.33 mi (830.95 km) |
| Harrow on the Hill to Bourges | 333.05 mi (536.00 km) |
| Harrow on the Hill to Bourgoin-Jallieu | 485.85 mi (781.89 km) |
| Harrow on the Hill to Bressuire | 326.58 mi (525.57 km) |
| Harrow on the Hill to Brest | 286.72 mi (461.42 km) |
| Harrow on the Hill to Bretigny-sur-Orge | 235.21 mi (378.54 km) |
| Harrow on the Hill to Breuillet | 235.09 mi (378.34 km) |
| Harrow on the Hill to Briancon | 560.88 mi (902.65 km) |
